While tossing a football with Sam at Goober's service station, Emmett falls into the grease pit. The guys take Emmett to the Doctor and learn he broke his arm. He'll have to wear a cast for 5-6 weeks. Emmett is worried about having to close his shop. Not wanting to leave the town without a fix-it shop, Emmett puts an add in the paper for help. A scientifically-minded high school boy named Ernie applies for the job. Emmett at first turns him down, but then hires him. Emmett soon learns that Ernie is very skilled at fixing things. Word spreads around town about how talented Ernie is and now everyone is bringing in things to be fixed by him. A depressed Emmett tells Sam that he's closing up shop and leaving Mayberry. He says his shop just isn't the same anymore. Sam tells Emmett that even he has to try and keep up with new things and methods. After Emmett leaves, Sam calls the high school. Emmett winds up joining Mr. Desmond's science class at the school.
Just as Jim Phelps and the others unwittingly become caught up in a royal power struggle, a bomb goes off, seriously injuring Paris and revealing his disguise.
Candy has inherited a fortune from an Indian he helped. He quits his job on the Ponderosa and becomes a vice president for a land promotor who is selling beautiful, fertile land. When it is discovered that the land promotor is selling barren desert land, Candy and the Cartwrights set out to expose the land promotor as a fraud.
The Earthlings become involved in the politics of a secret underground city.
Ransome manages to escape from the plastics factory and alert UNIT, prompting the Doctor and the Brigadier to start an investigation.
While on vacation in the Himalayas, the gang goes to a winter lodge where the owner tells them about the ghost of a Yeti that is out to get revenge on the man that caused his death and will turn anyone into ghosts.
Things heat up as Hogan schemes to return a load of stolen paintings to London, just as Marya convinces Schultz to impersonate Reich Marshal Goering.
Max poses as a wax sculpture of Hitler to spy on a KAOS scientist who brings waxworks to life.
The Cannon family runs the High Chaparral Ranch in the Arizona Territory in 1870s.
Darrin is hexed by Endora yet again, this time everything he says comes out as a popular cliche.
Silver Dollar City's mayor is fixin' to send Shorty back to the hills.
Two military policeman spot John Mala, a man who McGarrett has helped in the past, but who has gone AWOL. One of the policemen is shot, and tensions rise as Five-O and the army police clash in their techniques of investigation and their treatment of the local population.
Bronson becomes part of a singing duo with Billy Mulavey in order to compete in a song contest and land a job at a highway honky-tonk. Johnny Dell, a greedy local disk jockey, signs songwriter Billy to a restrictive contract, but Billy has running on his mind. Betty, the waitress who loves Billy, and Bronson wonder about Billy's veracity when Mickey Rand claims ownership of the songs written by Billy.
Jeannie, Tony, Roger and the Bellows' go on vacation only to find there are no rooms available in the hotel they wish to stay in. Jeannie then proceeds to blink on a 13th floor.
An orphan steals from Matt but could risk his own life when he tries to help out in an ambush.
Lucy Carter, a widow with two teen children, takes a job as a secretary for her stuffy brother-in-law.
Goober is at the bus stop waiting for his niece Beverly to arrive. Beverly is at Goober's gas station when she meets Tommy and they both seem to like each other. Tommy talks to Millie about Beverly. He would like to ask her to the Siler City high school dance but he's never asked a girl for a date. Tommy calls and Goober answers the phone. When Goober finds out what Tommy wants, he rudely tells him Beverly can't go out with him and hangs up. Millie and Beverly overhear the conversation and Beverly gets upset. Millie and Sam talk Goober into letting Beverly go with Tommy. It's the night of the dance and Goober gives Tommy a specific time to have Beverly home. On the way back from the dance, Tommy runs out of gas. Tommy calls but Goober doesn't believe that's what happened. When the kids get home, Goober loses his cool and chases Tommy away. Beverly stops talking to Goober. Goober finds a way to make things right.
With the king's sister rescued during the wedding, the team now turns its attention to the true heir, who's locked up in prison.
Ben needs to haul three beams that are 30 feet long and the Cambeau Freight Company will not do it. A new, independent freight hauler may be the answer. However, when Ben meets Gunny, he orders him off the Ponderosa. Ben and Gunny served together in the Mexican war, and chose opposite sides. Ben puts his differences aside with Gunny and helps him win the government contract away from Cambeau Freight Company.