Search in Limbo Bonanza : Season 13 Episode 21

The Cartwrights attempt to reconstruct a 24-hour period of Ben's life after he fears he may have been the unknown gunman who shot down Sid Langley, a corrupt real estate broker who has become hated in Virginia City. The reason? Ben had suffered a concussion from an unknown source just before his meeting with Langley and happened to be his last appointment before a critically wounded Langley was found. Oh, and Ben strongly disapproved of Langley's unethical business practices.