The New Adventures of Gilligan - Season 1 - Eps 12: The Disappearing Act
Gilligan mysteriously disappears without explanation. It turns out he was just out looking for coconuts.
About The New Adventures of Gilligan

Title: The New Adventures of Gilligan
First Air Date: 1974-09-07
Last Air Date: 1975-10-18
Status: Ended
Rating: 4.8/10 (from 4 votes)
Language: EN
Seasons: 2
Total Episodes: 32
Network: ABC
Genres: Animation
Production Companies: Filmation Associates
Synopsis
The New Adventures of Gilligan is an animated series produced by Filmation and was aired on ABC during the 1974–1977 seasons. In 1977, the show entered syndication as part of an anthology series entitled The Groovie Goolies and Friends.
Cast

Bob Denver
Gilligan (voice)

Alan Hale Jr.
Captain Skipper Jonas Grumby (voice)

Jim Backus
Thurston Howell III (voice)

Natalie Schafer
Eunice Wentworth 'Lovey' Howell (voice)

Jane Webb
Ginger Grant / Mary Ann Summers (voices)

Russell Johnson
Professor Roy Hinkley (voice)

Lou Scheimer
Snubby the Monkey (voice) (uncredited)