Enterprise is the target.
Prepare phaser banks
one and two, Mr. Sulu.
Aye, sir.
Mr. Chekov, get a fix
on the missile's
point of origin.
Aye, Captain.
Phasers one and two
locked in and ready.
Fire phasers.
Mr. Chekov,
alter course
to the missile's
point of origin.
Warp factor three,
Mr. Sulu.
Warp factor three,
sir.
I am a nurse first.
A member of the crew
of the Enterprise second.
You're excused.
Return to your quarters.
No, I'm sorry,
Doctor.
I've called
the captain,
and I'll wait
until he comes.
What's the emergency?
I said you
were excused, Nurse.
Please, Christine.
I promise you
I'll give the captain
a full report.
That was quite a scene.
I've just completed the standard
physical examinations
for the entire crew.
Excellent.
What's the emergency?
The crew is fit.
I found
nothing unusual
with one exception.
Serious?
Terminal.
What is it?
Xeno-polycythemia.
It has no cure.
Who?
He has one year
to live.
Who is it?
The ship's chief
medical officer.
You.
I'll be most effective
on the job
in the time left
if you'll keep this
to yourself.
Space--
the final frontier.
These are the voyages
of the star ship Enterprise.
Its five-year mission--
to explore
strange new worlds...
to seek out new life
and new civilizations...
to boldly go where
no man has gone before.
Captain's Log--
Star date 5476.3.
I have just had
the sad duty
of informing Starfleet
about Dr. McCoy's condition
and have requested
an immediate replacement.
Mr. Spock.
Yes, Captain?
Confirm
Chekov's coordinates
for the missile's
point of origin.
Correct, Captain. We are
approaching those coordinates.
That object
on the screen?
An asteroid.
200 miles
in diameter.
Could the enemy vessel be
hiding behind the asteroid?
Negative, Captain.
We've had that area
on scanners constantly.
Then the asteroid
is the missile's point of origin.
Correct, Captain.
Full sensor probe,
Mr. Spock.
Typical asteroid
chemically,
but it is not orbiting.
It is pursing
an independent course
through this solar system.
How could that be?
Unless it's...
powered...
a spaceship.
It is
under power, Captain.
And correcting for all
gravitational stresses.
Source of power?
Atomic. Very archaic.
Leaving a trail of debris
and hard radiation.
Mr. Chekov,
plot the course
of the asteroid vessel.
Asteroid has
an outer shell,
which is hollow.
It surrounds
an independent inner core,
which has a breathable
atmosphere.
Sensors read
no life forms.
Then it must be
on automatic controls.
And the passengers,
or builders,
are dead.
Course of asteroid--
I mean, spaceship--
241 mark 17.
- Interesting.
- Yes.
The course Ensign Chekov
Just gave for the asteroid
would put it on
a collision course
with Daran Five.
Daran Five?
Inhabited?
Correct.
Population approximately
3 billion, 724 million,
if memory serves me
correctly.
Estimated time of impact--
396 days.
Mr. Sulu,
match Enterprise speed
with that
of the asteroid vessel.
Mr. Spock and I
are transporting aboard.
- Mr. Scott, you have the con.
- Aye, sir.
A lot can happen
in a year.
Please, give yourself
every minute.
Dr. McCoy,
Mr. Spock and I'll
handle this.
Without me, Jim?
You'd never find
your way back.
Well...
I think it would
be wiser if--
I'd like to go.
I'm fine, Captain.
All right, Doctor.
If that's
what you want.
You'd swear you're
on the surface of a planet.
One fails
to see the logic
in making a ship
look like a planet.
Wouldn't know
this was a spaceship.
Kirk to Enterprise.
Enterprise.
Scott here.
Transport
without incident.
Kirk out.
No apparent opening.
You found no intelligent
life forms, Mr. Spock, but surely--
The asteroid ship is
over 10,000 years old.
Still no sign
of life forms, Captain.
These are weapons.
Of a sort.
Weapons.
Communication devices.
Let me go
to my friend.
You all right?
I think so.
I am Natira,
the high priestess
of the people.