Against Tony's wishes, Roger and Dr. Bellows scheme to throw the future groom a bachelor party. The party must be kept secret from Amada Bellows and the other NASA wives.

Roger spreads the word to everyone that Jeannie is expecting but all the while its a misunderstanding and the only one that is expecting is Mrs. Djinn Djinn (the dog).

The Bellows' troublesome nephew stays at the Nelson house for a couple days and figures out the truth about Jeannie when he sees her smoke into her bottle.

There is a card shark working NASA over.