Contact is made with the planet Piri, where the main computer created an idyllic life that led to extinction of its population through apathy; now John Koenig must fight to save Alpha as his people fall under the same fate.
The first baby is born on the moon and brings great joy for the first time in a long while to the Alphans. However, terrifying events follow with an outer space battle between spaceships that could decide the fates of hundreds.
The Alphans encounter the voyager space probe that has been wandering the cosmos propelled by the queller drive, a faulty engine system; following the probe is a fleet of alien ships from a world devastated by the drive.
Carol brings on Lucille Ball, Eddie Albert, and Nancy Wilson; Albert drops in on Carol & Sis as Roger's new, health-nutty boss; all three appear on As The Stomach Turns.
Guest star George Gobel joins Carol in a V.I.P. interview of a duke and duchess living in squalor in New York; Bobbie Gentry takes us on a musical journey.
Carol's guests are George Chakiris and Shirley Jones; Chakiris joins Carol for the Q&A, while the latest Carol & Sis sketch finds Jones playing Roger's temp secretary.
Blondie and Dagwood are given an Asian idol as a gift, but it has a reputation as a jinx; soon, the Bumstead family becomes plagued by one accident after another.
The Bumsteads receive an ugly lamp from the Dithers for their anniversary and promptly return it to the store; when J.C. and Cora are expected for dinner, Dagwood and family scramble to buy it back.