Unidentified Flying Oddball is a 1979 science fiction comedy film. It is based on Mark Twain's 1889 novel A Connecticut Yankee in King Arthur's Court, directed by Russ Mayberry and produced by Walt Disney Productions. Released in the United Kingdom as The Spaceman and King Arthur, then subsequently re-released in the United States as A Spaceman in King Arthur's Court, the film stars Dennis Dugan as NASA employee Tom Trimble who unintentionally travels back in time with his look-alike android Hermes.

A Connecticut Yankee in King Arthur's Court is an 1889 novel by American humorist and writer Mark Twain. The book was originally titled A Yankee in King Arthur's Court. Some early editions are titled A Yankee at the Court of King Arthur.