Jonas Grumby is one of the main characters. Skipper Jonas Grumby Played By Alan Hale Jr. First Appearance Two on a Raft Birthday May 1 Contents[show] Personality Profile Seasons Season 1 Season 2 Season 3 Outfits Trivia Categories: Characters S.S. Minnow Season 1 Season 2 Season 3 Community content is available under CC-BY-SA unless otherwise noted.