S3·E6 Laugh, Captain, Laugh

After Parker nearly drowns Binghamton, during an accident on the 73, The Captain calls for a Fitness Board Inquiry to determine Parker's fitness for duty. McHale and The Boys then execute a clever plan - Involving nitrous oxide, or 'Laughing Gas' - To help Binghamton to change his mind, which backfires, when an Admiral from the board arrives early, to investigate Parker's situation.