give a proper response
to the probe.
Stabilize.
Emergency reserve.
Starfleet command,
do you read me?
Go ahead. We hear you.
Starfleet command, if you read me,
we're going to attempt time travel.
We are computing our trajectory
at this time... this time.
Get him back. Get him back!
Ready to engage computer, Admiral.
What's our target in time?
Late 20th century.
Can you be more specific?
Not with this equipment.
I've programmed some
of the variables
from memory.
What are the variables?
Availability of fuel components,
vessel mass through
a time continuum,
and probable
location of whales-
In this case,
the Pacific basin.
You've programmed that from memory?
I have.
"Angels and ministers
of grace, defend us."
Hamlet, act l, scene IV.
No doubt about your memory, Spock.
Engage computers.
Prepare for warp speed.
Shields, Mr. Chekov.
Shields, aye.
May fortune favor the foolish.
Warp speed, Mr. Sulu.
Warp 2.
Warp 3.
Steady as she goes.
Warp 4.
Warp 5.
Warp 6.
Warp 7.
Warp 8!
Sir, heat shields at maximum.
Warp 9!
9.2.
9.3.
We need breakaway speed.
9.5.
9.6.
9.7.
9.8.
I'm o.k.! I'm fine!
Now, Mr. Sulu!
Oh, oh...
Wait. Wait...
Oh, I should
never have left...
Coming up now, sir.
My God, Jim, where are we?
It's the human thing to do.
Spock, you're talking about
the end of human life.
Mr. Sulu.
Mr. Sulu.
Mr. Sulu.
Aye, sir.
What is our condition?
Sir, the braking
thrusters have fired.
Picture, please.
Earth.
But when?
Spock?
Judging by the
atmospheric pollution,
I believe we've arrived
at the latter half
of the 20th century.
Well done, Spock.
Admiral, if I may.
We're probably
already visible
to the tracking devices
of the time.
Quite right, Mr. Spock.
Engage cloaking device,
Mr. Chekov.
We are crossing
the terminator into night.
Homing in on the west coast
of North America.
Admiral,
I am receiving whale song.
Put them on speakers.
Admiral, this is strange.
The song is directly ahead.
It's coming from San Francisco.
From the city?
That doesn't make sense.
Admiral, we have a serious problem.
Would you please come down?
It's these Klingon crystals, Admiral.
The time travel drained them.
They're giving out, decrystallizing.
Give me a round figure.
Oh, 24 hours, give or take,
staying cloaked.
After that, we're visible,
and dead in the water.
We won't have enough
to break out of earth's gravity,
let alone get home.
I can't believe
we'll be stopped by this.
There's no way of
recrystallizing dilithium?
Sorry, sir.
We can't even do that
in the 23rd century.
Admiral, there may be
a 20th-century possibility.
Explain.
If memory serves,
there was a dubious flirtation
with nuclear fission reactors
resulting in toxic side effects.
By the beginning
of the fusion era,
these reactors
had been replaced,
but we may be able
to find some.
But you said they were toxic.
We could construct
a device to collect
their high-energy
photons safely.
These photons could
then be injected
into the dilithium chamber
causing crystalline
restructure,
theoretically.
Where would we find
these reactors,
theoretically?
Nuclear power was widely used
in naval vessels.
San Francisco.
I was born there.
It doesn't look
all that different.
Set us down
in Golden Gate Park.
Aye, sir.
Descending.
We'll divide into teams.
Commanders Uhura
and Chekov, the uranium.
Dr. McCoy, you, Mr. Scott,
and Commander Sulu
will convert us a whale tank...
Oh, joy.
while Spock and I
attempt to trace these
whale songs to their source.
I'll have bearing
and distance, sir.
I want everybody to be careful.
This is terra incognita.
Many of their customs
will doubtless surprise us.
It's a foregone conclusion
none of them have seen
an extraterrestrial before.
This is an extremely primitive
and paranoid culture.
Chekov will issue a phaser
and a communicator
to each team.
We'll maintain radio silence
except in emergencies.
Those in