1The Mechanical Man
The Earthlings become involved in a scientist's scheme to build an indestructible android.
2Six Hours to Live
The Earthlings come to the aid of a convicted criminal who has been falsely accused.
3The Inside Rail
Fitzhugh tries to use his gambling expertise to pick the winners at a local racetrack, but has to enter into a deal with a giant to do so.
4Deadly Pawn
The Earthlings must play a game of real-life chess with a demented giant industrialist.
5The Unsuspected
Steve is turned into a raving paranoid by exposure to mushroom spores, and cuts a deal with Inspector Kobick to betray his crewmates.
6Giants and All That Jazz
The Earthlings aid a giant trumpet player against crooks.
7Collector's Item
Valerie is forced to act as a toy ballerina in a giant's scheme to kill his rich uncle.
8Every Dog Needs a Boy
When Chipper is injured by a giant dog, Barry and the others must turn to a giant veterinarian and his sadistic son for assistance.
9Chamber of Fear
Fitzhugh is captured by the owner of a wax museum who is involved in a stolen-diamond racket.
10Comeback
The Spindrift come to the aid of a has-been horror actor but during his comeback movie they find themselves in danger from his enthusiastic director.
11The Clones
A giant scientist performs cloning experiments on the Earthlings.
12A Place Called Earth
Two time travellers from 5477 come to the Land of the Giants to conquer Earth.
13Land of the Lost
Barry and Valerie are carried off in a balloon to a distant land ruled by a malevolent dictator.
14Home Sweet Home
Fitzhugh and Steve accidentally return to Earth in a space-time pod but end up in 1900 and must deal with hostile villagers.
15Our Man O'Reilly
The Earthlings become involved with a superstitious Irish Giant who believes they're leprechauns.
16Nightmare
While working with a helpful Giant scientist, the Earthlings are subjected to radiation which causes strange hallucinations.
17Pay the Piper
An alien piper, claiming to be the Pied Piper of Hamlin, brings his act to the Land of the Giants.
18The Secret City of Limbo
The Earthlings become involved in the politics of a secret underground city.
19Panic
A friendly Giant has a teleport device that can send the Spindrift crew back to Earth, but the SID use the whole thing as a trap.
20The Deadly Dart
Mark is framed for the murder of two Giants and begins acting suspiciously, turning his crewmates against him.
21Doomsday
The Earthlings become involved in a sabotage scheme to destroy the nearby city.
22A Small War
A sadistic child unleashes his mechanical toys on the hapless Earthlings.
23The Marionettes
The Earthlings aid an injured puppeteer by pretending to be his dancing puppets, but the owner soon suspects they are involved and prepares to capture them for the reward.
24Wild Journey
Using a device stolen from time-travelling researchers, Steve and Dan return to the day of the Spindrift's launch and try to alter history and stop the ill-fated flight.
25Graveyard of Fools
The Earthlings become involved with twin brothers who are plotting to take over the planet.