The third Doctor and Jo find themselves on an artificial world inside the black hole while the second Doctor tries to find a way to control the organism.
Marcia falls for Dr. Vogel, the family's new dentist. When Dr. Vogel asks Mike if Marcia would be interested in doing some babysitting for his kids, she misinterprets it for him asking her out on a date.
Hannah O'Connel rules over a Syndicate family, including her two sons who act as her lieutenants. Hannah masterminded the theft of a million dollars in gold bullion, and escaped to the Caribbean with her surviving son Thomas - Robert turned government witness but Hannah shot and killed him. The IMF must get her to return to the U.S. and recover the gold. The O'Connel's are set up in a house run by Casey and led to believe it's haunted by Robert - their gunsels turn up ""dead"" and Hannah contacts shopkeeper Barney to arrange a voodoo exorcism. Hannah blacks out thanks to the IMF and they send her son Thomas running after faking him killing Willy over Casey. When Hannah wakes up Barney tells her that Robert is alive and got her to tell him the location of the gold while she was unconscious. Hannah hires Jim as a pilot to take her to the gold and the IMF move in for the arrest.
Fred and Lamont have bills coming out of their ears and consider going on welfare, something Fred refuses to do. Fred comes up with a plan to throw a "big party" in the Sanford home and charge admission. That's when two hoods show wanting a part of the action. Meanwhile, Aunt Esther is trying to find a place to hold her weekly church group meetings.
After a date, Shirley tries to discourage her recently re-acquainted former pediatrician from pursuing a relationship with her.
When her car breaks down, the famous extravagant actress, Alvira Drummond finds herself stranded on Waltons Mountain. The Children, especially Mary Ellen, are fascinated by her "Hollywood" ways.
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.
Features the sketches Dennis Moore, What the Stars Foretell, The Ideal Loon Exhibition, Off-Licence and Prejudice.
The Chief receives a worrying phone call from Ted Ollinger, an old friend, and he sends Ed to investigate. In the tiny town of Grant Bay Ed can find no sign of his former colleague; but he soon discovers that the locals are determined to hide something from him and that at least one of them will stop at nothing to keep him from the truth.
An elderly business associate of Ben's is killed after a man, posing as Candy, tries to rob her; the woman suffers a fatal heart attack, which - since it happens during the commission of a felony - is considered to be the same as if the assailant had pulled the trigger. The real Candy, who had been assaulted at a hotel by the same man, is held in connection with the old woman's death. A woman named Kate is the only one who can back up Candy's alibi, but she has left town with her husband, who is the thief. Griff agrees to go after Kate and have her provide a statement. Only thing is, he discovers - as Ben and Joe do later - that she, too, has a past that, if revealed at trial, could do serious harm to Candy's defense. Meanwhile, Ben is unsure about the young defense attorney's ability to defend Candy, particularly since the state's attorney has a nearly spotless conviction record. But the budding lawyer is determined to play David to the prosecutor's Goliath.
Two drifters, Gar and Nina, steal children and sell them on to a mainland adoption agency in order to raise the cash to buy a boat and go cruising.
Walter and Maude go to Massachusetts for an appliance seller's convention. When their reservations at a upscale hotel are botched, they must share a shabby motel. This is when a squabble ensues when Maude tries to confide in Walter the angst she has over not having any meaning in her life and the troubles she's been having trying to find a job because she's a woman.
Lucy Carter, a widow with two teen children, takes a job as a secretary for her stuffy brother-in-law.
A midget arrives in Dodge City claiming he will turn into an elephant at the stroke of midnight. Arizona begins asking for someone to care for him along with three bales of hay. Everyone finds the story a bit far fetched.
In the 1840s over the crest of the Rockies there lay the first successful community West of the United States, the residents called it the City of the Saints, it's more commonly known as Salt Lake City. In the aftermath of the Civil War, Americans headed further West, Cooke follows in their footsteps...
After seeing the sights in historical Boston, the gang is off to pay a surprise visit to Shaggy's Great Uncle Nathaniel. On the way they stumble upon The Harlem Globetrotters, who are picnicing and trying to rest up after a string of games they played around Boston. Back on the road to Uncle Nat's, Shaggy takes control of The Mystery Machine, and they begin to encounter ghosts resembling Paul Revere and soldiers of war in the road along the way. When the gangs get to Uncle Nat's, he reveals that the ghosts have scared everyone away -- and they're doing they're best to try to scare him away too. Soon the kids, Globetrotters and Uncle Nat begin running into ghosts all over the house. The following morning, everyone is on their way to a local cove when Uncle Nat tells them to keep their eyes peeled for a sea serpent that's been spotted in the lake -- subsequently Shaggy, Scooby, Meadowlark, and Curly encounter the the monster while scuba-diving. Fred and Velma come to the conclusion