A plane with the Singing Tyler Sisters aboard is forced down with engine trouble on a deserted island. McHale and The 73 Crew are sent to pick them up, with more than their rescue on their minds, but wind up being quite disappointed.

McHale and the boys cook up a scheme to keep Binghamton from building a new Officer's Club on McHale's island.

Christy finds out he's about to become a Father, so, while McHale is away in New Caledonia, Parker and the boys come up with a plan to raise money for expenses.

A pesky Japanese Pilot – Whom the base personnel have dubbed ‘Washing Machine Charlie' – Is wreaking havoc, with his daily strafing runs on Taratupa, and McHale and the 73 Crew have an incentive to bring him down.

When a Japanese radio announcer broadcasts details about Captain Binghamton that only someone close to him would know, Binghamton immediately suspects McHale and The 73 Crew, and enlists Parker's aid in nailing the traitor.

Binghamton schemes to get McHale chosen for a Liaison Officer's position, in Sydney, Austrailia. But, when McHale finds out that he will be going alone, and for the duration, he and his crew cook up a plan to get him off the hook.

Gruber does some shady trading with Chief Urulu involving Navy property, and McHale is arrested, and threatened with court martial. But Binghamton drops the charges, when he finds he needs help from Urulu and his tribe.

A Combat Photographer comes to Taratupa, to film a P.T. crew in action. But trouble erupts, when Gruber swipes the Photographer's movie camera, for a little private enterprise. McHale and the 73 crew then have to scheme, to cover their own behinds, as well as the Photographer's.

Parker is feeling somewhat depressed, after getting scared during a chase after a Japanese patrol boat, especially after Binghamton accuses him of cowardice. But Binghamton changes his mind, when Parker – During a test run, on the 73 – Spots a German U-Boat, and goes after it.

While trying to prevent McHale and the 73 Crew from putting on a show for the Taratupa personnel, Binghamton winds up in trouble along with McHale and the boys, and has to put on a show, himself, to help get them out of it.

A business venture - Involving the manufacture and sale of sarongs to the Base personnel - Has the guys divided into two separate quarreling groups. When the feud escalates, Binghamton tries to take advantage of it's effect on them, during a PT Crew efficiency test - Their failure of which, would mean their being shipped out for re-assignment.