Hondo and his team go after a gang of jewel thieves who make their getaways under water.
Lou puts on a brave face when he learns that his ex-wife Edie is remarrying.
The Doctor and the Brigadier begin to realise who the Zygon imposters among them are while Sarah Jane discovers a secret tunnel to the underwater ship.
Fred wakes up one morning to discover what looks like a robbery took place but learns that there was a small earthquake overnight. Grady breaks the news that a big one is scheduled to hit on the 6th and a fed up Fred decides to sell the house and move. Meanwhile, Fred heads to Las Vegas to avoid the earthquake on the 6th and has a run in with Merv Griffin and Steve and Eydie.
Trapper is shipped home while Hawkeye is on R&R. Hawkeye speeds to Kimpo with Radar to catch Trapper's plane, but they just miss him. While they are there, they pick up BJ Hunnicut and take him back to camp. On the way back, BJ is introduced to the Korean War.
Pike finally gets his call up papers and is to join the Airforce but when his blood that has been donated for the red cross is checked it is found to be from a rare group and he is excused military service Then he has to find a way to break the news to the platoon
The cases of an easy-going ex-convict turned private investigator.
Ed and Chico clash over the wall of their alley for an art competition.
When a lady cop is killed in a drug sting gone wrong, her boyfriend cop decides to take matters into his own hands. Stone and Keller try to stop him.
Reverend Fordwick asks John-Boy to deliver the Sunday sermon, and Miss Hunter asks Olivia to act as the substitute teacher. It proves to be an interesting experience for both as Reverend Fordwick and Miss Hunter plan their wedding and honeymoon
The body of Anton Zoref is invaded by an unknown life force. The man soon manifests an uncontrollable ability to absorb energy. As the Alphans struggle to understand this mysterious force, Zoref's need becomes insatiable. Driven by instinct, he makes his way to the greatest source of energy on Alpha: the Nuclear Generating Plant.
A disgruntled man with a belt of dynamite threatens to blow himself and the squad room sky high unless President Nixon agrees to speak with him; the plumbing goes kaput; Wojo arrests a phony man-of-the-cloth.
After the mill closes, Charles is unable to pay off his debt at the mercantile. Mr. Hanson is forced to close the mill after one of his big customers declares bankruptcy. This was after Hanson had already shipped them a bunch of lumber. Charles had been expecting two months worth of wages before Hanson was forced to close down. Charles must taken on several jobs at the same time. Mary gets a job to help the family, while Laura does the chores at home. When the bill finally gets paid, Nels tells Charles that he thinks Charles is the richest man in Walnut Grove, since he has a very loving family.
An elderly couple, desperate to draw attention to the poor living conditions in their old folk’s home, have rigged the trunk of their car with fifty sticks of dynamite and a timer, planning to set it off outside City Hall. But the car is stolen by two thugs on a spree of armed liquor store robberies, unaware that the car is loaded with explosives, ticking towards detonation in the trunk.
Baretta comes to suspect that his close friend, a music store owner, may not only be a drug dealer, but may be unknowingly selling heroin so pure that it is killing his customers.
A flashback recalls Gabe's first meeting with his class. The Sweathogs Out Debate A Superior Class.
With Howard's hardware store about to face new competition, the Cunninghams decide they need to rent the room above their garage to generate extra income. Howard is shocked when Richie rents it to Fonzie.