Ghost a Go-Go

Ghost a Go-Go is the 27th episode of the Second season. It aired on March 24, 1966.

Synopsis
The Castaways discover a ghost on the island trying to scare them off by moaning at night and doing mischief. However, the Professor gets suspicious when a boat suddenly turns up and proposes they turn the tables on the ghost. They create dummies to place in the boat which blows up off-shore as the Ghost watches and reveals himself to be a Russian spy trying to scare the Castaways off the Island for the off-shore oil property rights. Hearing the Castaways haunting the island as ghosts, he goes to investigate only to run screaming into the night and swimming off to reach his U-Boat off shore. The next day as the tide returns the clothes from the dummies, Gilligan is terrified when a sea turtle moves the Skipper's shirt without him in it.

Trivia

 * The ghost is played by Richard Kiel, best know as "Jaws" from the James Bond film franchise.
 * Charles Maxwell, who supplies the voice on the radio, also does the voice of the Russian commander.
 * The Skipper, who has long believed in the superstitions of the island natives, such as in Three to Get Ready and Voodoo, now decides he doesn't believe in ghosts.
 * It is possible that the Ghost was hired to scare off the Castaways from the Island based on Russian Intelligence from Nyet, Nyet, Not Yet, likely leading into Gilligan vs. Gilligan.