The Earthlings try to salvage radium from a clock but find themselves at the mercy of giant scientists using a sound detector to home in on them.

Barry is strick by appendicitis and the Earthlings have no choice but to turn to a giant doctor for assistance.

An amnesiac Fitzhugh falls in with two giant thieves and becomes their willing accomplice.

This time around, four punk kids from Earth run up against the Spindrift crew.

The Giants have invented a chemical that forces those exposed to it to tell the truth, and plan to test it on the Earthlings.

The Giants have invented a detector that can home in on Earth-based metals, and Dan puts the entire group at risk due to the surgical pin in his leg.

The Earthlings come to the aid of a giant deaf boy and his poverty-stricken family.

The Earthlings must play a game of real-life chess with a demented giant industrialist.

The Earthlings aid a giant trumpet player against crooks.

When Chipper is injured by a giant dog, Barry and the others must turn to a giant veterinarian and his sadistic son for assistance.

Fitzhugh is captured by the owner of a wax museum who is involved in a stolen-diamond racket.

While working with a helpful Giant scientist, the Earthlings are subjected to radiation which causes strange hallucinations.

An alien piper, claiming to be the Pied Piper of Hamlin, brings his act to the Land of the Giants.

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.

A sadistic child unleashes his mechanical toys on the hapless Earthlings.