Lost in Space Episode 55: Trip Through the Robot

General Information

Director: Don Richardson

Writer: Barney Slater

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

Composer: None (Stock Music)

Air Date: 3/22/1967

Production #: 9527



Having exhausted his power supply, the Robot ventures into the Valley of Shadows to expire. Upon locating the Robot, Will and Dr. Smith discover that their mechanicallost-in-space-trip-through-the-robot friend has been transformed into a giant version of his former self—a result of extreme radioactivity. Only by entering the Robot’s body, now magnified by a hundred times, can Will and Dr. Smith repair the environmental protection unit before his time runs out.

By offering a unique and clever spin on the premise for Fantastic Voyage, “Trip Through the Robot” earns its reputation as one of the greatest episodes of Lost in Space. Especially terrific are the props, sound effects, and set designs used to represent the internal workings of the Robot, which, when coupled with the cinematography lost-in-space-trip-through-the-robotof Frank Carson, enhance the credibility of an otherwise extraordinary concept.



By portraying Will with a realistic manner of desperation, Billy Mumy compels the audience to accept the central theme of Barney Slater’s narrative (i.e. that the Robinson boy will stop at nothing to save the “life” of his beloved companion). Contrasting the noble and selfless attributes of Will, Dr. Smith frequently lost-in-space-trip-through-the-robotbehaves in a despicable fashion, thereby accentuating the primary conflict of this episode; specifically, the not-so-good doctor repeatedly urges Will to abandon the Robot during his time of need, forcing the young lad to act alone (at least for the most part) when attempting to complete the gargantuan task before him.

In addition, many facets of the Robot’s interior will no doubt captivate fans of the science fiction genre. Similar to the white blood cells in Fantastic Voyage, for example, a self-activated laser machine serves to protect the Robot from so-called invaders—an imaginative twist on the source material.



lost-in-space-trip-through-the-robotA convenient plot device, the Robot’s growth makes little if any sense from a scientific perspective.



For emphasizing the Robot’s worth, “Trip Through the Robot” deserves praise from Lost in Space enthusiasts. Though prior episodes (e.g. “War of the Robots” and “Wreck of the Robot”) had done so already, this installment indicates that Will and (arguably) Dr. Smith will place their lives in danger when providing assistance to a nonhuman friend—an aspect that further solidifies the Robot as an invaluable member of the Robinson family.


Concluding Comments

“Trip Through the Robot” is a classic and heartwarming, if occasionally sappy, episode of Lost in Space. Exceptionally poignant is the performance of Mumy, which allows the viewer to understand and relate with Will’s fervent dedication to the Robot.


Overall Quality: 10/10


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2 thoughts on “Lost in Space Episode 55: Trip Through the Robot

  1. This is my number three 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. This very popular episode is widely regarded as the top episode of the season. Indeed, it was my number one for many a year, but somewhere during the past fifteen years it dipped to number three. It is always classic. This is the FANTASTIC VOYAGE episode of LOST IN SPACE.

    The old 1998 trivia book ranks this one on top for the season, and in my old online episode ranking polls in 2000 this one came out on top as well.

    This episode contains perhaps the most exciting sequence of the season, and one of the very top for the entire series perhaps. The music is all classic as well. This is just excellent, excellent stuff, as far as colored episodes go..