Three giants transport four of the travelers to a distant land; guest Albert Salmi.
A space time manipulator allows Steve and Dan the chance to relive the hours before they crash landed.
In return for his help, the travelers improve a puppeteer's (Frank Ferguson) act.
The travelers battle a giant boy's radio-controlled toy army.
The travelers uncover a plot to set off bombs within a city; guest Francine York.
An inventor agrees to help the space travelers return to earth with the aid of a teleportation device.
War looms between the surface-dwelling giants and others who live underground; guest Malachi Throne.
A giant piper (Jonathan Harris) tries to collect a reward for capturing the travelers.
Radiation from Dan's new power device causes hallucinations and makes the travelers invisible.
A superstitious giant (Alan Hale) believes the travelers are leprechauns.
Four of the earth people discover a new land when they are carried across the sea in a child's balloon.
The travelers battle two ruthless Earthmen (Warren Stevens, Jerry Douglas) from the year 5477.
A scientist (William Schallert) makes exact duplicates of four of the travelers.
The travelers try to help a despondent giant (John Carradine) make a movie comeback.
The space travelers work to free Fitzhugh who has been captured by the owners of an eerie wax museum.
The travelers are in danger when Chipper must go to the vet for an operation.
A giant (Guy Stockwell) plans to use Valerie in a plot to murder his rich uncle.
To free Barry and Valerie, Dan must coach a giant trumpet-player (Sugar Ray Robinson).
Toxic toadstool spores transform Steve into a dangerous paranoid.
The travelers are strapped to chess pieces and forced to play for their lives.
Fitzhugh's love of gambling puts the rest of the space travelers in danger when he finds a winning ticket at the race track.
The travelers have only six hours to clear a condemned giant of murder.
A giant scientist (Broderick Crawford) wants Mark to figure out why a robot is malfunctioning.
Steve and Mark are pressured into helping Inspector Kobick locate underground freedom workers headquarters.
The space travelers strike a bargain with their captors, a hearing aid for their deaf son in exchange for freedom.
The space travelers seek help from a man sympathetic to their cause when Mark is captured by the chief of the police bureau.
Feeling responsible, the travelers try to rescue two giant children trapped in a shaft.
The travelers help a giant magician (Jack Albertson) clear himself of involuntary manslaughter.
Fitzhugh abandons his fellow space travelers after ingesting a formula which causes him to become giant sized.
Mark bargains with a scientist to trade his technical skills for a ride back to Earth.
Barry's efforts to rescue Chipper, who is being displayed at the zoo, result in four of the other space travelers being captured.
Two giant orphans mistake Fitzhugh for a magic elf that grants wishes.
Inspector Korbick is able to track down the space travelers with a device which detects non-native metals.
A giant scientist (Michael Ansara) pursues the travelers.
The space travelers are stalked by bounty hunters when a reward is offered for their capture.
Brainwashed Steve may reveal the location of a transmitter linked to Earth; guest Warren Stevens.
The crew encounters a group of delinquents who are the last of 28 teens who crash-landed two years prior.
The giants use a captured girl (Celeste Yarnall) as bait to lure Mark.
The travelers find a survivor (Glenn Corbett) of an early experimental spaceflight.
Giant thieves want Fitzhugh to help them steal a ruby from a museum.
When Barry needs an appendectomy, Steve receives unexpected help from a giant doctor.
The girls are captured by a scientist and his assitant while trying to collect radium from an abandoned clock.
A giant convict (John Napier) grabs the spaceship then is caught in quicksand.
A giant, miniaturized by pills, befriends the space travelers in an effort to obtain knowledge of earth.
A giant Gypsy captures Fitzhugh and Barry and plans to sell them to a circus.
A giant professor needs the travelers' help to destroy an incriminating envelope.
Steve and Fitzhugh witness a murder and then struggle to prove the innocence of the hobo who has been set-up for the crime.
The space travelers are tormented by a giant girl when they become trapped in the miniature town built by her grandfather.
A London-bound flight in 1983 passes through a space warp and crashes on a world where everything is huge.