Season 1 (1968–69) Note: In this episode, the characters are revealed to be in fact on another planet, when Akman tells his granddaughter that the little people are from Earth.
Guest Stars: Percy Helton (Akman), Amber Flower (Granddaughter),
Raymond Guth (Tramp) }}
Guest Stars: Stewart Bradley (Senior Scientist),
Morgan Jones (Assistant Scientist) }}
Guest Stars: Paul Fix (Dr. Brulle),
Henry Corden (Janitor),
Wesley Lau (Policeman #1),
Harry Lauter (First Cop), Grant Sullivan (Cop #2), Gary Tigerman (Delivery Boy) }}
Note: "The Weird World" was intended to be the second episode aired; this accounts for the villainous behavior of Fitzhugh, who subsequently became a more admirable character.
Guest Stars: Glenn Corbett (Major Kagen), Don Gazzaniga (Giant Watchman) }}
Guest Stars: Celeste Yarnall (Marna Whelan), Douglas Bank (Giant Scientist), Dawson Palmer (First Scientist), Page Slattery (Second Scientist) }}
Guest Stars: Paul Sorensen (Giant Camper),
Kimberly Beck (Giant Girl) }}
Guest Star: Michael Ansara (Murtrah) }}
Guest Stars: Larry Ward (Talf Ekorb), Jan Shepard (Osla Ekorb),
Tol Avery (Mr Derg),
Gary Dubin (Dal Ekorb) }}
Note: Series regular Stefan Arngrim does not appear in this episode.
Guest Stars: Robert F. Lyons (Nalor), Timothy Scott (Trilling),
Kevin Hagen (Insp. Kobick),
Norman Burton (Sergeant), Patrick Sullivan Burke (Golan), Erik L. Nelson (SID Man) }} }}
Season 2 (1969–70) Note: Series regular Heather Young (Betty) does not appear in this episode.
Guest Stars: William Schallert (Dr. Arno), Sandra Giles (Dr. Greta Gault) }}
Guest Stars: Charles Drake (Mr. Erdap), Sean Kelly (Alek), Miriam Schiller (Nurse) }} }}