Star Trek (1966–1969)
21 user 5 critic

Whom Gods Destroy 

1:31 | Trailer

Watch Now

With Prime Video

Kirk and Spock are taken prisoners by a former starship captain named Garth, who now resides at, and has taken over, a high security asylum for the criminally insane.


Herb Wallerstein


Gene Roddenberry (created by), Lee Erwin (teleplay by) | 3 more credits »





Episode complete credited cast:
William Shatner ... Capt. Kirk
Leonard Nimoy ... Mr. Spock
DeForest Kelley ... Dr. McCoy
Steve Ihnat ... Garth
Yvonne Craig ... Marta
James Doohan ... Scott
George Takei ... Sulu
Nichelle Nichols ... Uhura
Dick Geary Dick Geary ... Andorian (as Richard Geary)
Gary Downey Gary Downey ... Tellarite
Keye Luke ... Cory


The Enterprise travels to the planet Elba II, home of the last asylum for the criminally insane, to deliver a serum that should cure all of its remaining inmates. Kirk and Spock beam down to the planet's surface where all seems in order, but they soon find the inmates now run the asylum, led by Garth (at one time a starship Captain, whose exploits were required reading at the Academy). Garth, who's learned how to shape-shift, can take on the appearance of anyone, including Kirk or Spock. In the process of learning this ability, he lost his sanity. Garth plans to pose as the Captain, beam up to the Enterprise and take over the ship, but Kirk has a roadblock set up to overcome. Written by garykmcd

Plot Summary | Add Synopsis


TV-PG | See all certifications »


Official Sites:

Official site





Release Date:

3 January 1969 (USA) See more »

Company Credits

Show more on IMDbPro »

Technical Specs


Sound Mix:




Aspect Ratio:

See full technical specs »

Did You Know?


Steve Ihnat had previously played a character named Garth in Honey West: A Million Bucks in Anybody's Language (1965). See more »


The Enterprise is delivering medical supplies. Why doesn't the landing party containing any medical officers? See more »


Garth: I may have you beaten to death.
Marta: No, you won't, because I am the most beautiful woman on this planet.
Garth: You're the only woman on this planet, you stupid cow!
See more »

Alternate Versions

Special Enhanced version Digitally Remastered with new exterior shots and remade opening theme song See more »


Referenced in Buffy the Vampire Slayer: The Replacement (2000) See more »

Frequently Asked Questions

This FAQ is empty. Add the first question.

User Reviews

Former Starship Captain Is An Insane Shape-Shifter
14 January 2017 | by Rainey-DawnSee all my reviews

Season 3, episode 14. The Enterprise has arrived at the planet Elba II, which is an asylum for the criminally insane, with a serum that can possibly cure all of the inmates. Kirk and Spock beam down and find that all of the inmates are running the asylum including former (now insane) starship captain Garth, who's exploits were once required reading at the academy. Garth has learned how to shape-shift and can become anyone including Kirk or Spock. The criminals hold Kirk and Spock captive so he can take over the Enterprise and escape. Kirk and Spock learn of all this and has a surprise waiting for Garth. Before Kirk left, he gave Scotty a chess problem as a sign - which plays an important role in signaling the Ship.

Another one of those "fun" episodes. As others have said, it is flawed but fun to watch. They sure loved to pair Kirk with green skinned or haired women did they. LOL. It's a joy to watch the lovely Yvonne Craig as Marta.


2 of 3 people found this review helpful.  Was this review helpful to you? | Report this
Review this title | See all 21 user reviews »

Contribute to This Page

Free Movies and TV Shows You Can Watch Now

On IMDb TV, you can catch Hollywood hits and popular TV series at no cost. Select any poster below to play the movie, totally free!

Browse free movies and TV series

Stream Popular Action and Adventure Titles With Prime Video

Explore popular action and adventure titles available to stream with Prime Video.

Start your free trial

Recently Viewed