Clue: O Captain! My Captain! A poem by Walt Whitman. Spangram: Captain. Answers Captain Planet: Cartoon character from the 90s. Captain Obvious: A sarcastic reply to someone stating the obvious used in the US, also a character in TV commercials. Captain Kangaroo: A children’s TV show host in the US from the 50s - 80s. Captain Hook: A character from the novel Peter Pan. Captain Underpants: A character from a series of illustrated childrens’ novels. Cap’n Crunch: The cartoon mascot of a breakfast cereal in the US.