Gilligan's Island
X Marks the Spot
TV Flash files “X Marks the Spot” as hour 18 of 98 in the TV Flash guide — Gilligan's Island (1964–1967) on CBS, season 1, episode 18, aired 1965-01-30, 30 min.
From the desk
How this hour is filed
This leaf is S01E18: listed hour 18 of 98 in the Gilligan's Island guide, hour 18 of 36 in season 1. It aired 1965-01-30 (30 min). The listed hour before it is “Little Island, Big Gun” (S01E17). Next is “Gilligan Meets Jungle Boy” (S01E19).

Catalog log
Broadcast listing — not a TV Flash recap.
It is a normal day on the island, the Skipper and Gilligan are working on their normal projects for their little community. Meanwhile, the Pentagon decides to test a new missile, the target they choose is the Castaways island.
Viewer FAQ
Where does X Marks the Spot sit in the Gilligan's Island guide?
S01E18 is listed hour 18 of 98 — hour 18 of 36 in season 1, season 1 episode 18.
When did Gilligan's Island S01E18 air?
X Marks the Spot aired 1965-01-30 and is listed at 30 minutes.
Where should I start?
The premise is the first hour: shipwreck, seven types, island as trap. After that, any episode is a complete coconut farce. The theme song is the map.
In the series
Why this series still plays
A three-hour tour became television's eternal trap: seven castaways, one island, and a theme song that outbuilt half the scripts. Sherwood Schwartz's hierarchy — Gilligan, Skipper, Howells, Ginger, Professor, Mary Ann — is costume-clear comfort farce. Watch it for high-concept sitcom architecture and the fan argument that never left: why not just fix the boat?
A three-hour tour became television's most stubborn window. Sherwood Schwartz's *Gilligan's Island* (CBS, 1964–1967) ran **three seasons, 98 episodes**, and then refused to un-wreck. Seven types, one uncharted island, infinite coconuts and guest-star interruptions: high-concept sitcom architecture so costume-clear a child could cast the reunion. Rex will toast the theme song as folklore. The theme song was the bible. It outbuilt half the scripts.
Filed against
- Bob Denver as Gilligan
Bob Denver’s Gilligan trapped a three-hour tour as television’s eternal sitcom — seven castaways, one island, a theme song that outbuilt half the scripts, Sherwood Schwartz’s hierarchy of Skipper, Howells, Ginger, Professor, Mary Ann as…
- Alan Hale Jr. as Jonas 'The Skipper' Grumby
Alan Hale Jr.’s Jonas “The Skipper” Grumby skippered television’s eternal three-hour tour — Gilligan’s Island as seven castaways, one island, a theme song that outbuilt half the scripts, Sherwood Schwartz hierarchy in costume-clear…
- Jim Backus as Thurston Howell III
Jim Backus’s Thurston Howell III turned a three-hour tour into television’s eternal class joke — Gilligan’s Island hierarchy in costume, Howells as yacht money marooned with a Skipper and a Professor. 1960s high-concept farce. TV Flash…
- Tina Louise as Ginger Grant
Tina Louise glamour-wrecked Gilligan's Island as Ginger Grant — a three-hour tour as television's eternal trap, seven castaways, costume-clear comfort farce, a movie star stranded in a theme song that outbuilt half the scripts. TV Flash…
- Dawn Wells as Mary Ann Summers
Dawn Wells’s Mary Ann Summers won Gilligan’s Island by looking like Kansas — a three-hour tour as television’s eternal trap, seven castaways, costume-clear comfort farce, Ginger as the other pole. Sherwood Schwartz hierarchy. TV Flash…