Moby Dick and the Mighty Mightor

The Sea Ark [Moby Dick] (1x47)

Air date: Dec 23, 1967

Tubb is trying to ride a Sea Pony. After Tubb is thrown off, a pair of Gill Men captures the Sea Pony. Moby and the boys try to free him but Moby is trapped in a cave by a powerful force field and Tom is captured himself. Will Moby be able to get free and help his friends?