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Star Trek: Tomorrow is Yesterday

After a near-collision with a black star, the Enterprise is thrown back to 20th century Earth. They rescue an Air Force pilot, John Christopher, when his ship breaks up in their tractor beam, but realize they have created a paradox: they can't send him back to Earth with knowledge of the future, but if they take him with them to the future then his son will never be born and history will be changed.

Episode Info
Episode number: 1x19
Production Number: 6149-21
Airdate: Thursday January 26th, 1967

Starring Roles
DeForest KelleyDeForest Kelley
As Dr. Leonard Horatio "Bones" McCoy
James DoohanJames Doohan
As Lt. Cmdr. Montgomery "Scotty" Scott
George TakeiGeorge Takei
As Lt. Hikaru Sulu
Nichelle NicholsNichelle Nichols
As Lt. Nyota Uhura

Guest Stars
Roger PerryRoger Perry
As Major Christopher
Hal LynchHal Lynch
As Air Police Sergeant

Co-Guest Stars
John WinstonJohn Winston
As Transporter Chief
Richard MerrifieldRichard Merrifield
As Technician
Ed PeckEd Peck
As Col. Fellini
Mark DempseyMark Dempsey
As Air Force Captain
Jim Spencer (1)Jim Spencer (1)
As Air Policeman
Sherri TownsendSherri Townsend
As Crew Woman

Majel BarrettMajel Barrett
voiced Computer
Eddie PaskeyEddie Paskey
As Lt. Leslie
Frank Da VinciFrank Da Vinci
As Brent/Vinci
William BlackburnWilliam Blackburn
As Lt. Hadley
Main Cast
William ShatnerWilliam Shatner
As Captain James Tiberius Kirk
Leonard NimoyLeonard Nimoy
As Commander Spock


In the 1960s, the U.S. Air Force mobilizes to intercept an unidentified flying object spotted over Omaha. The object is the Enterprise, which was en route to Starbase 9 when it collided with a black hole. They’re unable to contact Starfleet and the engines are damaged, and pick up radio transmissions identifying when they are in time...

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Episode Notes
This episode takes place primarily in early July 1969, approximately one week before the launch of the Apollo 11 mission on July 16.

The episode was originally intended to be the second part of "The Naked Now."

Episode Quotes
Kirk: This is very difficult to explain. We're from your future. A time warp placed us here. It was an accident.
Christopher: You seem to have a lot of them.

Christopher: I never have believed in little green men.
Spock: Neither have I, Captain Christopher.

Kirk: (to Spock) Your logic can be most... annoying.

Computer: Computed and recorded, dear.
Kirk: Computer, you will not address me in that manner. Compute.
Computer: Computed...dear.

Christopher: Too bad, Captain. Maybe I can't go home, but neither can you. You're as much a prisoner in time as I am.

Kirk: But in our society, he'd be useless. Archaic.
McCoy: Maybe he could be retrained, re-educated.
Kirk: Now you're sounding like Spock.
McCoy: If you're going to get nasty, I'm going to leave.

Kirk: You said you had some additional information, Mr. Spock?
Spock: I made an error in my computations.
McCoy: Oh? This could be an historic occasion.

McCoy: How long have they been down there now?
Spock: 15 minutes, 28 seconds.
McCoy: Well, shouldn't they be coming up?
Spock: It is a fact, Doctor, that prowling by stealth is more time-consuming than a direct approach. In our case...
McCoy: Shouldn't you be working on your time warp calculations, Mr. Spock?
Spock: (looking off into space) I am.

Kirk: Uh...Colonel, would you mind being careful with that?
Colonel: That worries you, huh? Is that a radio, transmitter of some kind?
Kirk: Of some kind.
Colonel: You can be more specific than that, Kirk. I don't like mysteries. [waves phaser around]
Kirk: If you don't stop being careless with that, you'll have one-- a big one.

Colonel: What is that? Is that a uniform of some kind?
Kirk: This little thing? Something I slipped on.

Kirk: All right, Colonel. The truth is, I'm a little green man from Alpha Centauri, a beautiful place. You ought to see it.
Colonel: I am going to lock you up for 200 years.
Kirk: That ought to be just about right.

Episode Goofs
Colonel Fellini promises to throw Kirk in jail "for about 200 years." Kirk replies under his breath that that "ought to be just about right." But in fact, the Original series takes place 300 years in the future. A two hundred year prison sentence, should he somehow survive it, would still leave Kirk 100 years shy of the people and places he knows...

Captain Christopher is incorrectly listed as "Major" in the end credits.

What Changed in the Remastered Version
Improvements (including better sky effects) to shots of the Enterprise in low orbit, and Captain Christopher's F-104 Starfighter in intercept. Shots from inside the aircraft now include cockpit bracing structural members. Improvements to the Enterprise model better suggest distress with a wobbling climb to Earth orbit. The slingshot passage to the Sun vastly improved with a close passage by the sun that includes a corona effect, and better images of both Earth and moon.

Other Episode Crew

CreatorGene Roddenberry
Executive ProducerGene Roddenberry
ProducerGene L. Coon
CastingJoseph D'Agosta
Costume DesignerWilliam Ware Theiss
Make-upFred B. Phillips
GripGeorge Rader
Property MasterIrving A. Feinberg
Script SupervisorGeorge A. Rutter
GafferGeorge H. Merhoff
OtherHerbert F. Solow (Executive in Charge of Production)
Sound MixerDoug Grindstaff
Special EffectsJames Rugg
Main Title ThemeAlexander Courage
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