Lost in Space Episode 33: Forbidden World

General Information

Director: Don Richardson

Writer: Barney Slater

Cast: Guy Williams, June Lockhart, Mark Goddard, Marta Kristen, Billy Mumy, Angela Cartwright, Jonathan Harris, and Wally Cox

Composer: Robert Drasnin

Air Date: 10/5/1966

Production #: 9504



Having sustained considerable damage while escaping from the ghost planet, the Jupiter 2 lands on a mysterious world occupied by Tiabo (Wally Cox)—an eccentric humanoid who threatens to attack the Robinson family—and a lost-in-space-forbidden-worldgiant bird monster. Thereafter, Dr. Smith ingests a liquid explosive, posing a grave danger to those around him.

By showcasing the versatile abilities of character actor Wally Cox, “Forbidden World” will likely appeal to the youngest of Lost in Space enthusiasts. Viewers in search of a coherent and logical science fiction piece, on the other hand, are advised to avoid this episode.



lost-in-space-forbidden-worldDuring the pre-credit sequence, Professor Robinson and Major West attempt a highly dangerous, unorthodox maneuver in order to evade a powerful missile. Despite recycling footage from “Island in the Sky” (the third episode of Lost in Space), the opening scene should be commended for its riveting execution.



Hoping to create the illusion of an extensive army residing on the planet, Tiabo employs a variety of silly disguises while communicating with Will and Dr.lost-in-space-forbidden-world Smith—a juvenile comedic device that cheapens a potentially serious, existential threat to the main characters.

Fearing that Smith will endanger the Robinson family if allowed to remain alive, the Robot connects a detonator to the not-so-good doctor and prepares to ignite the volatile substance in his body. Though intended to be amusing, the Robot’s decision to eliminate Dr. Smith may disturb those of a sensitive nature.



lost-in-space-forbidden-worldDesperate to save Dr. Smith, Will places his life in jeopardy by approaching Tiabo and asking him for a neutralizer—a poignant gesture that serves as a testament to Will’s kind and courageous, if somewhat foolish, character.


Concluding Comments

“Forbidden World” is a disjointed and grossly underwhelming final chapter of season two’s initial story arc. The performance of Cox may, however, appeal to fans of the quirky, campy humor by which many Lost in Space episodes are defined.


Overall Quality: 3/10


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2 thoughts on “Lost in Space Episode 33: Forbidden World

  1. This is my number eighteen ranked episode for the classic down home, cozy and fun, colored mid season..my second favorite season of the series, despite its much maligned and unwarranted status.. :-]

  2. There is nothing wrong with any of the first four episodes of the season. Am I the one to ask though? I pretty much love everything about this season.

    The Jupiter 2 once again makes a crash landing onto a planet. Although Mr. Tiabo is not a classic alien, I like him just fine. His ‘parrot creature’ companion (‘Big Bird’) is much-maligned. Janos Prohaska did the honors..who also did work for STAR TREK and elsewhere..