Alan Hale Jr.'s Captain Jonas Grumby looks shocked in closeup in Gilligan's Island - CBS Alan Hale Jr. starred in the beloved CBS sitcom "Gilligan's Island," but it wasn't his first appearance in one of the network's best-known shows. Two years prior to the 1964 debut of "Gilligan's Island," Hale Jr. showed up in an episode of the similarly legendary Western series "Rawhide," which boasted a young Clint Eastwood as one of its stars.