Chevron 6, encoded.
Glad you could make it, colonel.
Wouldn't miss it, sir.
This is my favorite part.
Chevron 7, locked.
Proceeding with malp transit.
Man: Malp en route.
You look tense.
No, I'd say anxious.
I am neither tense nor anxious.
Perhaps concerned.
Why?
The address of this planet was procured from
the repository of the ancients.
Receiving malp telemetry.
Jackson: Nothing I can see resembles anything we know
about the ancients.
Architecture, technology, writing.
Maybe what we're looking at
came to this planet after the ancients left it.
Teal'c, do you recognize any of this?
I do not, general Hammond.
Nope, neither do I.
I'm just saying.
What's it doing?
Flying, sir.
Malps can't fly.
Apparently they can.
Shouldn'tthere be a memo on this stuff?
I do not believe we are still in control.
Run a systems diagnostic on the malp.
It's stopped transmitting.
N egative, sir.
We're still getting a strong signal.
We should be receiving video.
Uh, major, you should take a look at this.
Carter: Sir, very high frequency oscillations
are being transmitted on a feedback loop.
They may be trying to communicate.
They?
Well, whoever they are.
Exactly.
What?
Sir, I recommend we disengage the Stargate
and analyze this data before proceeding.
Agree. Terminate the link.
Whoa, we've got an em spike.
The system's overloading.
Shut it down.
I can't get in. Try override.
Control systems are locked down.
Aah!
Ow!
The computer's no longer under our control.
Emergency disconnect, sir?
Do it.
Major, are you ok?
Yes, sir.
Let's get him to the infirmary.
He's got first— And second—degree burns, sir,
mostly superficial,
but I would like to run some more tests.
Very well.
The Stargate control systems
and their redundancies are inoperative,
including the Iris.
The circuitry in these terminals
has been completely fused.
Any idea what that was?
None, sir.
The secondary systems are up and running,
butthat was one hell of an em spike.
I'd like to run a full systems diagnostic
on the main computer.
Yeah, after I treat this hand.
As soon as I get the systems up—...
It is Avery bad burn, Sam.
5 minutes. Now.
Do as the doctor says.
Yes, sir.
Thank you, colonel.
You, Daniel, and Teal'c are next.
What? We're fine.
Yeah, well, iwould like to be the judge of that.
Some form of energy came th rough the Stargate.
I think it's only prudent to make sure there's
no physiological effects to those exposed.
A.s.a.p.
Who put her in charge?
The us. Air force.
In medical matters, Dr. Fraiser may overrule
those of any rank.
I'm not getting all my memos.
Well, by the looks of the control room,
I'd say you're both very lucky.
I guess it could have been worse.
I'd like to know what it was trying to do
in the first place.
Unfortunately, our best diagnostic tool
for figuring that out has been trashed.
You're all done here. Thanks.
Reporting as requested.
Than ks, Teal'c. Just have a seat.
Can you freeze it just before it cuts out?
Iwantto getavideo capture of this hub thing.
I might be able to cross—reference
the architecture.
No, on second thought,
I don'tthinkthis place is even remotely connected
to ancient earth.
Carter: There.
This is the start of
the strange high—frequency oscillations.
They began seconds after we lost video
and started to multiply exponentially.
After that, the oscillations maxed out our equipment
and made it impossible to measure them.
Now, if I isolate this smaller, more detailed signal,
and expand the time line...
There.
That's a waveform of some kind.
The alien signal.
Piggybacked on the malp telemetry.
That must be how it managed to come back
through an outgoing wormhole.
I can't properly analyze it
until I get the computers back up.
My hands are tied.
Well, there are other computers in the world.
Not that I can access.
General Hammond's put the sgc under quarantine.
So information was accessed.
Apparently.
Why? By what?
We don't know, sir, but it branched out
through very specific areas:
Network and language software,
followed by system and applications software.
Learning to read, learning to talk.
And knowledge of our systems.
You're saying something was inside our computers.
Well, we're just guessing atthis point,
but, uh—— whatever it was,
we managed to interrupt it
before it could complete
its entire scan of our computer.
Were you able to determine anything further
from the malp transmissions?
Not a single reference on— or offworld
that even remotely resembles the architecture.
It's entirely alien.
We're running avirus scan and purging
the entire mainframe, but it's a long process.
Our file allocation tables
were corrupted by the surge,
and there are sectors we'll never
be able to recover.
I'm maintaining defcon 2
and keeping the mountain locked down
until you can tell me with confidence
there will be no further repercussions.
Yes, sir.
So it's a probe?
No, we're saying it's like a probe.
We actually don't know what to call it.
We do know that before we were able to cut it off,
a structured em wave managed to navigate
over half of our computer system.
For what reason?
Well, we sent a probe to their world.
So we're calling it a probe.
Sure.
Um, the point is,
we don't know what would have happened
if we hadn't interrupted it.
It did an awful lot of damage.
Perhaps that was the intention.
Or maybe it was intended to have been passive,
but just so advanced that it overwhelmed our systems.
We really have no way of knowing.
Now, what is this?
Carter: Those are the high—frequency
oscillations we received.
They're time—magnified and scaled for detail.
Looks like high—amplitude tracings of an eeg.
Like a brain wave?
Yeah.
Hello?
It's still here.
What, the probe?
Well, whatever it is.
Carter: It must have been sustaining itself
within our secondary systems
while we were cleaning up the main computer.
Do I look fat?
It's like it wants us to know
that it's here.
Come here often?
Yeah, all right. That's me.
Beg your pardon, sir.
The dialing sequencer justwent down.
Take it offline, sergeant.
Yes, sir.
It's learning.
Learning what?
About us.
What we are and what we do here.
Put a stop to it, major.
Yes, sir.
Uh, we don't even know its intentions.
Doctor, I can't allow an alien technology
into our computer systems, whatever its intentions.
Hammond: Have we maintained quarantine?
Carter: Yes, sir. For the moment, we're still isolated.
I don't want to risk contamination to the outside world.
I want whatever this is stopped
right here, right now.
Ithinkit likes me.
From what I can decipher, sir,
it's like a computer program—...
Incredibly invasive,
but as complex as a DNA strand,
and it's growing.
It's eating more and more memory.
Can you remove it?
Well, this will take a complete shutdown
of all systems on—base connected to the mainframe,
followed by a low—level format of all drives.
Unfortunately, sir, any and all data
not properly backed up before this event
will be destroyed,
but it's the only way to be sure.
UN derstood. Do it.
We'll be out of commission for a while, sir.
I've already alerted all offworld teams
to stay put until further notice.
Yes, sir.
Sergeant?
Stand by for base—wide systems power—down.
Sergeant: Powering down.
Hey.
All scans came back clean, sir.
Thank you, sergeant.
We may have only lost data
from the last 24 hours before the event.
We'll know more when I can hook back up
with the sgc archives in the Pentagon.
I'd like you and sergeant siler
to double—check your results
before we do that.
Yes, sir.
Major?
You're kidding.
O'Neill: Carter.
Emergency lighting?
In the malp room, yes, sir.
A small power usage anomaly.
General Hammond said we should check it out
before we resume normal operations.
Forget to change light bulbs, siler?
It's not my job, sir—— ahem!
Yes, sir. Light bulb. Very amusing.
It's warm.
Carter: Fire?
Siler: Alarms would be going off by now, major.
It's been welded from the inside.
By who? There's been nobody on this level
since the power sh utdown.
Get atorch.
What is it?
I don't know, sir.
Ithinkwe robbed the alien program of an environment,
so it created one.
It appears to be sustaining itself
from the electric power from the emergency light system.
It must have gotten into a malp,
survived on battery power
while we were shut down, and builtthis...
Memory mainframe while we were on emergency power.
A memory mainframe?
I know for a fact that we wiped out aton of it.
This program must use incredible compression.
It must be able to reproduce itself
from a fraction of its original size.
And now, it's expanding
into whatever available memory it can find.
General, we're going to need some claymores down here.
Hammond: I'm on my way.
You want to blow it up?
Yes.
Why?
Sir, we've completely isolated
this area of the base.
There is no chance of reinfection of our computer.
It's obviously fighting to survive.
So do bacteria.
It's trying to communicate.
So do bac—...
Sir, I agree with Daniel.
This is a life form,
obviously intelligent.
We've been in the exact same position
as this alien entity,
I don't know how many times.
We're on another planet,
cut off from our world,
trying to stay alive.
What in god's name?
Hello, general.
Whatever got into our computers
apparently has built a nest.
Overnight?
Carter: According to the security log,
there hasn't been any human activity
in the malp room for over 36 hours.
For the record, sir,
I want to blow it to hell.
These folks want to chat with it.
Are you absolutely certain
it can't reconnect to our computers?
General?
It's surviving on an emergency circuit
which is battery—powered,
so it's isolated from the rest of the base.
We can kill it just by severing that connection.
How do you intend to proceed?
Well, sir, it's provided an interface.
I'd like to at least try to make contact with it.
If anything goes wrong, we cut the power.
Very well.
Maybe it's trying to figure out
why we sent a probe to its world.
Major Carter?
Carter!
Fraiser: Start an EKG and eeg.
Ok. On my count.
3,2,1.
We in?
Charge the paddles, 100.
Take over.
It's normal sinus rhythm.
Sir?
What? What is it?
These readings match those that infected
the computer in the first place.
It's inside her.
(Tapping on computer keyboard)
These weaker readings are major Carter's,
these are the entity's.
How can a computer program
be inside a human brain?
Sam said the entity was looking for memory
within which to expand, and the human brain
is capable of storing terabytes of information.
How do you intend to remove it?
I doubt it's even possible, sir.
I mean, more and more of her brain is being stimulated,
and it's impossible to tell whether her memory is being
suppressed, overwritten, or erased entirely.
Teal'c: General Hammond,
I recommend that major Carter
be placed under armed guard.
What?
If an alien entity
has somehow invaded her body,
then she is a security risk,
and must be treated as such.
I agree with Teal'c.
The entity has fooled us twice,
and I'll be damned if I let it do it again.
She's to remain under guard at all times.
Yes, sir.
(Equipment beeping)
Carter?
She's conscious.
Can you talk?
Colonel, her pet scan resembles that
of someone who's been the victim of a stroke.
Parts of her brain seem very active,
others seem dormant or suppressed.
The entity does have
complete motor control, however.
It might be able to communicate
with a speech synthesizer if I explain its operation.
Just concentrate on getting it out of her, will you?
I don't know how, sir.
What about the tok'ra or asgard?
Don'tthey owe us a favor by now?
Until this situation is resolved, colonel,
we're still under quarantine.
Hammond: That means from our allies, as well.
We cannot risk the entity leaving this facility.
Looks like it used a capacitor
from the malp to deliver a charge
right through the keyboard, sir.
Well, don't touch it.
Yes, sir.
Sam said it was growing,
expanding.
Perhaps the entity, as it possessed her,
sensed that major Carter's mind was a more efficient
memory storage vessel.
It was a trap
a trap?
Yep. It was watching us the whole time.
Uh, so you're saying it knew
Sam and I wanted to make contact with it?
Yeah.
And this device was created as a delivery system,
in order to invade the body of major Carter?
Yes.
So, basically, whatyou're saying is
that if we'd just listened to you
in the first place and blown it up...
No, seriously. I'm— I'm asking you.
Is that what you're saying?
Teal'c: If we had destroyed the entity, Daniel Jackson,
major Carter would not have been adversely affected.
Ok, look...
I know your first instinct is to protect——both of you—...
That's your job, that's what you do, but...
No matter what happens, no matter how this turns out...
Sam wasn't wrong to try to communicate with it.
(Footsteps receding)
(Birds chirping)
(Equipment beeping)
Computer voice: O'Neill.
That's right.
Go get the doc.
And you are...?
I am within.
You are O'Neill.
Yeah, we've established that.
This one has memory of you.
The one you're talking about is a person.
Her name is major Samantha Carter.
(Tapping keys)
Then... I am major.
No.
No, you're not.
We understand that you've taken control
of major Carter, butyou're not her.
(Tapping keys)
There was no other choice,
no other place to go.
You wish to terminate.
Still do.
(Tapping keys)
But you will not.
Not now.
I have observed.
You value the life of one.
Yes, we do.
(Tapping keys)
This one is important.
She is.
(Tapping keys)
For this reason,
this one was chosen.
You will not terminate this one
in order to destroy me.
It went into Sam out of self—preservation.
(Tapping keys)
I cannot be removed from this mind
without terminating.
You will not terminate this one.
(Tapping keys)
None of you will.
(Tapping keys)
Therefore, I will survive.
Fraiser: The entity insists
Sam's mind is intact,
but I can't detect anything
beyond the barest trace.
I believe, even if iwas
somehow able to remove it,
she would be essentially
brain—dead.
I see.
Then why does the entity insist
that Sam's mind is still within?
It's the only way to keep us from killing it.
Or it's telling thetruth,
and we just can't detect it.
Yeah, well, even if Sam is still
in there somewhere, it won't be for long.
The entity's influence is still growing
within her mind and there is nothing I can do to stop it.
What course of action remains?
Well, it wants to survive,
so we offer to send it home.
This alien technology is capable
of traveling back to us through an outgoing wormhole.
I won't risk the same thing happening again.
I've already ordered that the coordinates
be locked out of the dialing computer.
Jackson: Let me talk to it.
Maybe we can... convince it to leave willingly.
Very well, Dr. Jackson.
Dismissed.
Jack.
Sir?
We may have to make some difficult choices.
I know that major Carter means a great deal to you.
She is Avery valuable member of my team, sir.
Yes, she is.
My name is Daniel.
Computer voice: I am aware.
Right. You, uh...
You read my file.
Yes.
Then you know I am a scientist.
(Taps key) Yes.
(Tapping keys)
You have determined
I can not be extracted.
Yes.
(Tapping keys)
I will now offer information
in exchange for continued survival.
We don't want your information. We want Sam.
Leaving this mind
would cause termination.
Jackson: You left that thing
you constructed in the malp room.
Go back.
I have already grown beyond its capacity.
Why did you do this?
Why did you come here in the first place?
You attacked.
No, we sent a probe.
Yes.
It's something we do
to determine whether or not
a place is safe for humans.
Radio energy was emitted from your probe.
Contagion.
Much damage was caused within.
Within what?
Within us.
It spread before we understood it was poison.
You're saying your world was damaged
by radio waves from one probe?
Yes.
Well, we didn't mean to hurt you.
It was—— It was a misunderstanding.
Computer voice: Yet it is done.
So you came here to... to what?
Preserve.
Preserve your world?
Yes.
How?
By destroying you.
Well, that's not going to happen.
Transmission was interrupted.
If I had been able to complete transmission,
you would have been destroyed.
My world would have been preserved.
Well, in away, you succeeded.
We won't go back there.
You can repair the damage we did,
and we won't send any more probes through.
Yes, we will.
Jack?
We'll send dozens of them...
One after another.
I don't care what it does.
No.
Leave her. Now.
You won't.
You've read my file. Think again.
I must preserve.
Fine. Stickto your guns, then.
Jack?
Daniel, we're going to do this my way.
You can't.
General?
You're damn right we can.
No. Please.
Leave her.
I must preserve.
If you want to preserve your world,
leave major Carter right now.
O'Neill: Stand down.
Let her go.
We've got an emergency situation. Corridor 649.
I believe the alien is attempting
to return to the mainframe.
(Bird squawking)
(Equipment beeping)
Still no change?
I don't know if she ever told you this, colonel,
but Sam made a living will.
No extraordinary means.
Yeah. She told me.
There's no brain activity of any kind—...
No brain wave for either Sam or the entity.
She's being kept alive entirely on life support.
I think it's time to let her go, sir.
Just, uh, give it a minute, huh?
Yeah.
Justthought you should know,
Hammond ordered the mainframe thing
in the malp room destroyed,
in case the entity managed
to find its way back in there somehow.
That's probably what it was trying to do.
Sir, we're go for a systems restart.
Proceed, sergeant. Yes, sir.
(Equipment powering up)
All operational systems are back online.
Get back.
(Siren wailing)
It's the malp room, sir.
Sg—I to the malp room, immediately.
I think our friend is back, sir.
All right. Let's blow it.
Wait, wait, wait, wait, wait.
Look atthis.
The entity.
No, it said it couldn't go back.
It's Sam.
Daniel,
I shot her twice.
Jackson: After it transferred Sam's consciousness
out of her body.
You killed the entity
after it put Sam into this——this thing.
She's in here.
Why? Why would it do that?
Jackson: You demanded it.
You threatened to send an army of probes th rough to its home world.
Saving Sam and allowing itself to be killed
was the only way to preserve its home world.
Get me Hammond.
(Telephone rings)
Hammond.
General, we've got a situation down here.
Same here, colonel. I'm on my way.
This eeg matches Sam's.
I don't know how, but it's her.
So what do we do?
There's nothing I can do, sir,
butto provide a conduit for her to return into her own body.
The entity has deceived us on several occasions.
Go ahead, doctor.
Yes, sir.
(Exhales)
She's back.
H ey, Carter.
Where you been?
It's gone?
Yes, it is.
I was shouting
for you to hear.
We heard.