Walter Koenig: Chekov
Uhura : [Chekov and Sulu are lost in the woods of Yellowstone] Is there a problem, gentlemen?
Sulu : Uh, yes. We've been caught in a... we've been caught in a blizzard.
[Chekov blows on the communicator, simulating wind noises]
Chekov : And we can't see a thing. Request you direct us to the coordinates.
Uhura : My visual says sunny skies and seventy degrees.
Chekov : [stops blowing] Sulu, look. The sun's come out. It's a miracle.
Uhura : [over communicator] Don't worry, fellas. Your secret's safe with me. I'll sent a shutlecraft to pick you up.
Sulu : Uhura, I owe you one! Sulu out.
Kirk : Understand your situation, are unable to return to planet. Stand by to execute emergency landing plan... "B."
[Everyone in the shuttle stares at Kirk in confusion, and Spock mouths, "B?" Aboard the Enterprise:]
Chekov : What's emergency landing plan "B?"
Scotty : I don't have a clue.
Kirk : [over comm] "B" as in "barricade".
Scotty : He can't be serious!
[hiking in the woods of Yellowstone]
Chekov : Admit it, we're lost.
Sulu : All right, we're lost. But we're making good time!
Uhura : [over communicator] Commander Sulu, come in please.
Sulu : I don't believe this! Commander Sulu here.
Uhura : Bad news, gentlemen. Shore leave's been canceled.
Chekov : [relieved] Rescued at last!
Uhura : Return to the pre-arranged coordinates for pickup.
Chekov : Don't tell them we're lost. We'll never live it down here.