"That Which Survives"
Series Star Trek
Season 3, Episode 17
TOS 3x17 002
Air date January 24th, 1969
Writers John Meredyth Lucas; Michael Richards
Director Herb Wallerstein
Producers Gene Roddenberry; Fred Freiberger; Robert H. Justman; Edward K. Milkis; Gregg Peters
Starring William Shatner; Leonard Nimoy; DeForest Kelley
Episode guide
"The Mark of Gideon"
"The Lights of Zetar"

"That Which Survives" is the seventeenth episode of season three of the science fiction/action series Star Trek. It was directed by Herb Wallerstein and written by John Meredyth Lucas and D.C. Fontana (under the pseudonym Michael Richards). It first aired on NBC on Friday, January 24th, 1969. Like all episodes from the series, this episode was digitally remastered with upgraded visual effects and HD sound quality. The remastered version of the episode first aired on March 15th, 2008. In this episode, the crew of the USS Enterprise discover a new planet which represents a geological oddity considering it is only a few thousand years old. Captain Kirk brings a landing party down to collect data, but one by one, several of the crew members meet their final fates at the at the hands of a mysterious, yet alluring woman named Losira.

Synopsis Edit

Cast Edit

Principal Cast Edit

Actor Role
William Shatner Captain James T. Kirk
Leonard Nimoy Science Officer Spock
DeForest Kelley Leonard "Bones" McCoy

Guest Stars Edit

Actor Role
James Doohan Montgomery Scott
George Takei Ensign Hikaru Sulu
Nichelle Nichols Lieutenant Nyota Uhura
Lee Meriwether Losira
Naomi Pollack Rahda
Booker Bradshaw Doctor M'Benga
Brad Forrest Ensign Wyatt
Kenneth Washington Watkins
Bill Blackburn Lietenant Hadley
Frank da Vinci Lieutenant Brent
Roger Holloway Lieutenant Lemli

Notes & Trivia Edit

  • Production code number: 60043-069.
  • Stardate: Unknown
  • This is the third episode of Star Trek directed by Herb Wallerstein. He previously directed "Whom Gods Destroy". His next episode is the series' finale, "Turnabout Intruder".
  • Token redshirt: Lieutenant D'Amato; Killed by Losira's disintegrative touch.
  • Story writer D.C. Fontana is credited under the name Michael Richards in this episode.
  • Actress Naomi Pollack also played an Indian woman in "The Paradise Syndrome".
  • This is the second and final appearance of Doctor M'Benga. He appeared last in "A Private Little War".

Quotes Edit


  • Spock: Can you give me warp 8?
  • Montgomery Scott: Aye, sir. And maybe a wee bit more. I'll sit on the warp engines myself and nurse them.
  • Spock: That position, Mr. Scott, would be not only unavailing, but also... undignified.


  • Montgomery Scott: Mr. Spock, the ship feels wrong.
  • Spock: "Feels," Mr. Scott?
  • Montgomery Scott: I know it doesn't make sense. Instrumentation reads correct, but the feel is wrong! It's something I can't put into words.
  • Spock: That is obvious, Mr. Scott. Avoid emotionalism and simply keep your instruments correct. Spock out.


  • Lieutenant Uhura: Mr. Spock what are the chances of the captain and the others being alive?
  • Spock: Lieutenant, we are not engaged in gambling. We are proceeding in the only logical way to return to the place they were last seen, and factually ascertain whether or not they still live.


  • Montgomery Scott: Aye, Mister Spock, and I found out why. The emergency bypass control of the matter/antimatter integrator is fused. it's completely useless. The engines are running wild. there is no way to get at them. We should reach maximum overload in 15 minutes.
  • Spock: I would calculate 14.87 minutes Mr. Scott.
  • Montgomery Scott: Those few seconds won't make any difference Mister Spock. because you and I and the rest of the crew will no longer be here to bandy it back and forth. this thing is going to blow up, and there's nothing in the universe that can stop it.

See also Edit


The World of Star Trek

Star Trek miscellaneous

External Links Edit

Star Trek logo
This article relates to an episode from season 3 of Star Trek: The Original Series.

TOS 1x1 001
"All hands, Red Alert!"

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