Writer:	David Gerrold
Director:	Joseph Pevney
Star:	DeForest Kelley (Dr. Leonard Horatio "Bones" McCoy),  William Shatner (Captain James Tiberius Kirk),  Leonard Nimoy (Mr. Spock)
Recurring Role:	Eddie Paskey (Lt. Leslie (uncredited)),  Bob Orrison (Klingon #3 (uncredited)),  Jay D. Jones (Scott's Stunt Double (uncredited)),  David L. Ross (Guard),  Paul Baxley (Ensign Freeman),  Walter Koenig (Ensign Pavel Chekov),  Nichelle Nichols (Lt. Nyota Uhura),  James Doohan (Lt. Cmdr. Montgomery "Scotty" Scott)
Guest Star:	Guy Raymond (Trader),  Phil Adams (Korax's Stunt Double (uncredited)),  Richard Antoni (Klingon #1 (uncredited)),  Dick Crockett (Klingon #4 (uncredited)),  Jerry Summers (Chekov's Stunt Double (uncredited)),  Bob Myles (Klingon #2 (uncredited)),  William Schallert (Nilz Baris),  Charlie Brill (Arne Darvin),  Edwin Reimers (Adm. Fitzpatrick),  Michael Pataki (Korax),  Whit Bissell (Mr. Lurry),  Stanley Adams (Cyrano Jones),  William Campbell (Capt. Koloth)

Even in the re-mastered version, Koloth's lines "Captain, we Klingons are not as luxury-minded as you Earthers. We do not equip our ships with--how shall I say it? Nonessentials. We have been in space for five months. What we choose as recreation is our own business." are omitted, as is his curving hand gesture. (edit) According to the Star Trek: Deep Space Nine "Trials and Tribble-ations" episode, the events of this episode take place on a Friday, and last approximately 18 hours between the time the Enterprise is ordered to space station K-7 to the point at which Kirk reveals Darvon to be a Klingon spy. (edit) David Gerrold originally wrote the role of "Ensign Freeman" for himself, but wasn't able to play the role, because he was too skinny to be an Enterprise crewman. This resulted in Paul Baxley, a frequent extra and stunt man, getting a great deal of screentime and dialogue. (edit) William Campbell was intended to return as Koloth in several more episodes as Kirk's Klingon counterpart, including the episode "Day of the Dove" and several episodes of the planned, but never produced, fourth and fifth seasons. (edit) William Campbell, who portrayed the mischievous Trelane in "The Squire of Gothos", reprised his role as Koloth in the DS9 episode "Blood Oath". (edit)

Kirk: Mr. Chekov, this flight is supposed to provide both experience and knowledge. How close will we come to the nearest Klingon outpost if we continue on our present course?
Chekov: Ah, one parsec, sir. Close enough to smell them!
Spock: That is illogical, Ensign. Odors cannot travel through the vacuum of space.
Chekov: I was making a little joke, sir.
Spock: Extremely little, Ensign. (edit) Kirk: (to Nilz Baris) We have guards around the grain; we have guards around the Klingons, and the only reason they're there is because Starfleet wants them there. As for what you want, it has been noted and logged. (edit) Kirk: Scotty, you're... confined to quarters until further notice.
Scotty: Aye sir. Thank you, sir! That'll give me a chance to catch up on my technical journals! (edit) McCoy: Do you know what you get when you feed a tribble too much?
Kirk: A fat tribble.
McCoy: No, you get a whole bunch of hungry little tribbles.
Kirk: Well, all I can suggest is that you open a maternity ward. (edit) (Kirk orders a coffee and sandwich from the replicator, but instead gets more tribbles.)
Kirk: My coffee and chicken sandwich? (shows Spock) This is my coffee and chicken sandwich? (losing his patience) I want these things off the ship. I don't care if it takes every man we've got. I want them off the ship! (edit)

During the communication with Admiral Fitzpatrick in the briefing room, the screen displaying the admiral shows down to his mid-chest area in the wide shots, but closeups only show down to his shoulders. (edit) Cyrano Jones cannot pronounce the word Klingon correctly. He constantly says "Klingin" instead of Klingon. (edit) When Koloth is requesting that the tribbles be removed from the room, part of his goatee (on his left side) disappears. (edit) In the last exterior shot of the Enterprise and the station, neither one is moving. (edit) Chekov's drink repeatedly changes hands between shots. (edit)

This episode does not have any allusions. Add some now!