In the throes of his Pon Farr mating period, Spock must return to Vulcan to m...
Star Trek
Season 2 Episode 18: The Immunity Syndrome
The Enterprise encounters a gigantic energy draining space organism that threatens the galaxy.
3 SeasonsJan 19, 1968TV-PG50m7.5
The Enterprise encounters a gigantic energy draining space organism that threatens the galaxy.
In the throes of his Pon Farr mating period, Spock must return to Vulcan to m...
A powerful being claiming to be the Greek god Apollo appears and demands that...
A powerful artificially intelligent Earth probe, with a murderously twisted i...
A transporter accident places Captain Kirk's landing party in an alternate un...
Primitive inhabitants of Gamma Trianguli VI worship a god who orders them to ...
The USS Enterprise encounters the wrecked USS Constellation and its distraugh...
Very alien visitors to our galaxy attempt to connect with human consciousness...
Harry Mudd returns with a plot to take over the Enterprise by stranding the c...
While returning to the Enterprise aboard the shuttlecraft, Kirk, Spock, McCoy...
The Enterprise hosts a number of quarrelling diplomats, including Spock's fat...
The Federation clashes with the Klingon Empire over mining rights to Capella ...
A landing party from the Enterprise is exposed to strange form of radiation w...
Capt. Kirk obsessively hunts for a mysterious cloud creature he encountered i...
Kirk and the Enterprise computer become detectives after Scotty is accused of...
To protect a space station with a vital grain shipment, Kirk must deal with F...
16. The Gamesters of Triskelion
Aired: Jan 5, 1968Kirk, Uhura and Chekov are trapped on a planet where abducted aliens are ensl...
The crew of the Enterprise struggles to cope with a planet of imitative peopl...
The Enterprise encounters a gigantic energy draining space organism that thre...
Peaceful, primitive peoples get caught up in the struggle between superpowers...
The Enterprise is guided to a distant, long-dead world where survivors of an ...
Looking for a missing Federation cultural observer, Kirk and Spock find thems...
Galactic alien scouts capture the Enterprise for a return voyage and a prelud...
Responding to a distress signal, Kirk finds Captain Tracey of the U.S.S. Exet...
Kirk and a sub-skeleton crew are ordered to test out an advanced artificially...
The Enterprise crew investigates the disappearance of a ship's crew on a plan...
While back in time observing Earth in 1968, the Enterprise crew encounters th...
Main Cast
Guest Staring
Current Status: Ended
Network: NBC
Production Country: United States
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