revenge.
I want to ... crush
the life out of the Earps.
But I can't just
kill them.
Listen to me. Get down to the O.K.
Corral. Keep out of sight.
When the Earps
come looking ...
you bush whack 'em.
Can't I get it through
your stupid head?
I can't just kill 'em!
I can't kill 'em!
Kill 'em any way
you can!
There'll be no questions
asked. Honest.
I guarantee that!
These crude supplies
we were forced to use
worked quite well.
I doubt that this combination
of things was ever used
for any purpose
quite like this.
Perhaps they would've been
if they'd had your
ingenuity, Doctor.
Captain.
How soon will
that be ready?
Right now.
Good. How long
will it take
the tranquilizer
to have effect?
Three or four
seconds.
How did you manage
to test it?
It has not been tested.
It's not necessary,
Captain.
It's simple.
Nothing can go wrong.
Up to now,
everything's gone wrong.
I want it tested ...
and now.
Would a volunteer
solve the problem?
It would.
All right.
On one condition.
That I'm wide awake
and with you at 5:00.
Guaranteed.
Aye.
It's to kill the pain.
But this is painless.
Well, you should've warned
me sooner, Mr. Spock.
Fire away.
It should've worked.
Did you inhale
the gas, Scotty?
Aye. Deeply.
You still feel
all right?
I never felt
better.
No dizziness? No sweating?
No palpitations?
It doesn't work.
Indeed. Fascinating.
It was our last chance.
Captain, you don't seem
to understand.
It did not function,
but it must function.
Nothing could go wrong,
Captain. It should work.
A scientific fact ...
But if the tranquilizer
does not function,
which is clearly impossible,
then a radical alteration of our
thought patterns must be in order.
We need a weapon
an answer.
You don't have to worry
about that now, Jim.
Look at the clock.
10 minutes ...
and it's all going to
end at the O.K. Corral.
Well, we're going to
wait right here
until well after 5:00.
We're not going
to move from this spot.
Let's get out of here.
Scotty, Bones.
We're trapped.
They got their way.
We better
stand and fight.
Good. If they
want a fight,
let's give them
a fight.
They're experts
at gun fighting.
We don't have
a chance.
Then we'd better
become experts.
It may not
be necessary.
Spock, you've
got something?
The facts, Captain.
Physical laws simply
cannot be ignored.
Existence cannot be
without them.
What do you mean?
I mean, Doctor,
that we are faced with
a staggering contradiction.
The tranquilizer
you created
should have been
effective.
It would've been effective
anywhere else.
Exactly.
Doctor,
in your opinion,
what killed
Mr. Chekov?
A piece of lead
in his body.
Wrong.
His mind killed him.
If you've got
the answer, tell us.
Physical reality
is consistent
with universal laws.
Where the laws
do not operate,
there is no reality.
All of this ...
is unreal.
What do you mean
unreal?
I examined Chekov.
He's dead.
But you made
your examination
under conditions
which we cannot trust.
We judge reality
by the response of our senses.
Once we are convinced
of the reality
of a given situation,
we abide by its rules.
We judged the bullets
to be solid,
the guns to be real,
therefore they can kill.
Chekov is dead
because he believed
the bullets
would kill him.
He may indeed be dead.
We do not know.
But we do know
that the Melkotians
created the situation.
If we do not
allow ourselves
to believe that
the bullets are real,
they cannot kill us!
Exactly.
I know the bullets
are unreal,
therefore they
cannot harm me.
We must all be
as certain as you
if we're to
save our lives.
Precisely.
But that's
not possible.
There'd always be
some doubt.
The smallest doubt
would be enough to kill you.
We're just
human beings, Spock.
We don't have that
clockwork ticker in our head
like you do.
We can't turn it
on and off.
We must.
Spock, a Vulcan
mind meld.
Very well, sir.
Engineer ...
[Clock Chimes