Jethro wants to serve his country as a 007 spy. When he is dissuaded from this, he has to decide what branch of the military to join. Granny gets his to join the Marines because she still wants to catch the whale she saw a year ago. The Clampetts head to Marine Land, where Jethro is given a job of feeding the fish, though he thinks he is now enrolled, and Granny tries to catch the biggest fish she’s ever seen. She lassoes the fish and gets pulled in the water, and Elly swims with a few porpoises. After their visit, the Clampetts head home, with no sea critters for pets or dinner, and Jethro is not in any service or job.