The Great Grape Ape Show

The Invisible Ape (1x17)

: 01, 1975

After using Scrub-O Soap, Grape Ape becomes invisible. At the same time, two bank robbers decide to kidnap the inventor of Scrub-O Soap, Doctor Von Brain, and steal his invisibility formula, but they accidentally kidnap Beegle Beagle thinking he's the professor.