Land of the Giants (1968)

S2E16 Nightmare

As the Earthlings collaborate with a benevolent Giant scientist, they encounter unexpected radiation exposure that triggers bizarre and unsettling hallucinations. Struggling to distinguish between reality and their vivid imaginations, they must navigate the chaos and uncover the source of the phenomena. With the Giant's assistance, they embark on a journey to confront their fears and restore balance before the madness consumes them entirely.