Star Trek (1966–1969)
19 user 5 critic

The Tholian Web 

With Capt. Kirk and the derelict USS Defiant apparently lost, the Enterprise grapples with an insanity causing plague and an attack by the Tholians.


Herb Wallerstein


Gene Roddenberry (created by), Judy Burns | 1 more credit »

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Episode complete credited cast:
William Shatner ... Capt. Kirk
Leonard Nimoy ... Mr. Spock
DeForest Kelley ... Dr. McCoy
James Doohan ... Scott
George Takei ... Sulu
Walter Koenig ... Chekov
Nichelle Nichols ... Uhura
Majel Barrett ... Nurse Chapel
Sean Morgan Sean Morgan ... Lt. O'Neil


Kirk and the derelict starship Defiant vanish into a spatial interphase between universes. To rescue him, Spock must maintain position despite a growing, violent hysteria aboard the Enterprise, like that which destroyed the Defiant's crew, as well as a force field being laid around the Enterprise by Tholian patrol ships. Written by Tom D.

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TV-PG | See all certifications »


Official Sites:

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Release Date:

15 November 1968 (USA) See more »

Company Credits

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Technical Specs


Sound Mix:




Aspect Ratio:

1.33 : 1
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Did You Know?


The ship's chapel, which had previously appeared in "Balance of Terror", was a redress of the briefing room. See more »


When Chekov and McCoy return to the Defiant's bridge, via the turbo lift, the turbo lift doors open with a distinct "clunk". However when the turbo lift doors close, they close with the usual "swoosh" sound effect. See more »


Dr. McCoy: What did you have to gain by fighting the Tholians? You could have assured yourself of a captaincy by leaving the area. But you chose to stay. Why?
Mr. Spock: I need not explain my rationale to you, or to any other member of this crew. There is a margin of variation in any experiment. While there was a chance, I was bound, legally and morally, to ascertain the Captain's status.
Dr. McCoy: You mean, to be sure if he was dead. Well, you made certain of that.
See more »

Alternate Versions

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


Referenced in Star Trek Continues: Still Treads the Shadow (2017) See more »

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User Reviews

Now you see him, now you don't
8 December 2006 | by MartinHaferSee all my reviews

Kirk is on a ship that is somehow losing its integrity--literally vanishing. While the rest of the party investigating this derelict ship get back safely to the Enterprise, Kirk is stuck as the ship disappears forever! It appears he is dead and Spock officiates his memorial service. However, later Uhura and others begin seeing the Captain in his cheesy space suit as he magically appears and disappears in the ship. Perhaps he really isn't dead after all. Unfortunately, although they want to stay and investigate further, the stupid Tholians arrive and try to trap them forever in a giant space web unless they leave.

This is a space-bound episode and because they never land on any planets or see any aliens face-to-face, this is a duller and more static episode than average. While it isn't bad, it is poor enough to feel right at home with all the other weaker episodes of season 3 (by most every opinion, the quality of the series dropped in this final year).

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