At Christmas time, the gang reminisces over past episodes.
A new family, the Brimmer's, move to the Mountain and look for work and a place to live. Some people from the town are suspicious of their German accent and John helps them.
A man charges a sperm bank with murder after the lab unwittingly destroys the man's last sample.
CHP officers usually ride in pairs, but this day Ponch leaves Jon to handle an emergency. While Jon is alone, an officer pulls up to a car and acts improperly, so frightening the female driver that she causes a traffic accident as she speeds away. As the Highway Patrol searches for for the unknown officer, Jon learns that the mystery man is apparently his double - and that his career is in jeopardy as long as the phony remains at large.
Kris enters a tennis tournament when a series of unexplained accidents leaves one of the stars dead and the others too frightened to play.
Michael's apathetic behavior towards household chores and homework leads J.J. to put his foot down and to step in as a father figure. He really comes down hard when Michael and Penny are arrested for being in a stolen vehicle.
Three old men from Yorkshire who have never grown up face the trials of their fellow town citizens and everyday life and stay young by reminiscing about the days of their youth and attempting feats not common to the elderly.
Howard's father comes for a visit after being forceably retired as a captain of detectives due to his age. Not wanting to sit around, he gets a job at Fonzie's garage. After one day, Fonzie, not having the heart to do it himself, asks Howard to fire his father.
Danny takes drastic steps to keep from being killed and a mysterious woman arrives at Tinkler's jail with a startling announcement.
Hawkeye and B.J. refuse to shower until Charles stops playing his French horn, and Colonel Potter deals with a patient who wants to kill himself because he is now disfigured.
A rebel leader, his memory altered by an oppressive galactic government, suffers injustice after witnessing a massacre.
Three old men from Yorkshire who have never grown up face the trials of their fellow town citizens and everyday life and stay young by reminiscing about the days of their youth and attempting feats not common to the elderly.
Sketches/Songs: "A Gypsy's Violin", "When", "Down Memory Lane", Masseur sketch, "It's Not Easy Bein' Green", "Muppet Labs", "Cigarettes & Whiskey"
Steve is assigned to gain the confidence of a scientist who has developed a weapon to capture soldiers non-violently, but refuses to hand over the plans to anyone for fear it could cause drastic results if used on a pilot in flight. As Steve begins to become his friend and acquire the weapon, the Russians inform the scientist they are holding his wife hostage and demand the device in trade for her safe return.
Jeremy Brown starts his new job as a teacher of English as a foreign language and meets his students for the first time, a diverse group of ten adults in London, hailing from nine different countries in Europe and Asia.
Raul wants to join a basketball team and he can if Ed sponsors it, so that is what he does.