Gilligan's Island - Season 3 - Eps 8: Hair Today, Gone Tomorrow
Gilligan wakes up with white hair, and thinks he overhears the Professor say that he has a rare disease that has made him age quickly (the disease? ""follicular albinism""). When Mrs. Howell attempts to fix the problem by dyeing Gilligan's hair brown, the dye causes his hair to fall out. A classic line occurred as the other Castaways tried to act as though they don't notice Gilligan's baldness … Mrs. Howell's famous breakfast order: ""I think I'll have a hard-bald egg."" Later, the Skipper exhibits the same symptoms. The Professor determines the problems are caused by the crude bleach that Gilligan and the Skipper have been using while washing the castaways clothing.
About Gilligan's Island

Title: Gilligan's Island
First Air Date: 1964-09-26
Last Air Date: 1967-04-17
Status: Ended
Rating: 7.431/10 (from 238 votes)
Language: EN
Seasons: 4
Total Episodes: 98
Network: CBS
Genres: Comedy, Family
Production Companies: United Artists Television, CBS, Gladysya Productions
Synopsis
The slapstick adventures of hapless Gilligan, long-suffering Skipper and their gang of mismatched castaways, all stranded on an uncharted desert isle after their tiny ship hit stormy weather.
Cast

Bob Denver
Gilligan

Alan Hale Jr.
Jonas "The Skipper" Grumby

Jim Backus
Thurston Howell, III

Natalie Schafer
Eunice "Lovey" Wentworth Howell

Tina Louise
Ginger Grant

Dawn Wells
Mary Ann Summers

Russell Johnson
Roy "The Professor" Hinkley