Somebody inside the OSI has been leaking top secret information and the trail leads to janitor Clark O'Flaherty.
Millionairess Doris Bristol has brought gems into the hospital where she is undergoing cosmetic surgery. Her bodyguard, John DeLeon, is slain after he spots criminal Frank Malloy posing as a dying patient (part of a plan where a woman doctor and he plot to steal the jewels from the socialite). Hondo and his men, who are at the hospital putting together a Christmas party in the children's ward, find themselves on duty when the discovery of DeLeon's body leaves Mrs. Bristol unprotected and in apparent jeopardy.
Mary's old flame Dan Whitfield, who once proposed to her, returns to Minneapolis and she's forced to choose between him and her current boyfriend.
The Doctor and Sarah reach Earth and try to warn the research centre about the Kraal invasion before Styggron unleashes his virus.
The crew of Los Angeles County Fire Department Station 51, particularly the paramedic team, and Rampart Hospital respond to emergencies in their operating area.
Emily must contend with irate teachers, hamsters, and an escaped snake when she's unexpectedly upped to the position of school vice principal.
Fred is a Scrooge-like miser during the Christmas season and his friends try to get him to join into the Christmas spirit, but he rejects the attempts. After being accused of a being a Scrooge, Fred falls asleep and dreams up "A Christmas Carol." Now it is up to the spirits to take on the challenge that his friends failed at.
When exploring a habitable planet, members of the Alphan survey party vanish without a trace. Are they the victims of an indigenous tribe of Stone Age humanoids? The mystery deepens when a dead caveman is found to have capped teeth. Others soon notice the primitive cave chief and his mate bear an uncanny resemblance to the missing John Koenig and Helena Russell.
Whilst trying to stop the smuggling of small Oriental animal statues, McGarrett is caught illegally in possession of one of them as part of his personal collection.
The death of a night-watchman during a burglary puts Stone and Keller into the midst of a spy-vs.-spy conflict between high-tech industrial espionage firms.
When a local by-election comes round, it's time for all good men to come to the aid of the party. It's obvious which party Eddie is going to support ... or is it ? He's always leaned a bit to the left - but blood is thicker than water!
A man is convinced that a photo of Jean Harlow is his missing wife; a pair of lady cops makes an overzealous drug bust.
As Mary Ellen nervously awaites word on her acceptance to nursing school, the rest of the Waltons prepares surprise good-bye gifts. Mary Ellen is accepted, but she needs more work in math and science and ends up studying with John-Boy and Miss Nora Taylor, the county nurse.
The life and adventures of the Ingalls family in the nineteenth century American Midwest.
John Colby, an old friend of Starsky and Hutch's, returns to town, and asks them to use their connections to help him find his ex-wife Karen. But as they look for the woman, the duo find that there are things that don't quite add up, and, unbeknownst to them, the man holds a sinister and deadly secret.
Thelma brings home a friend of hers and instantly J.J. is smitten. However, when she rejects him he quickly loses all of his confidence and slips into a depression.
Mail brings a letter to Frank saying his wife is divorcing him, and one to Potter telling him he's going to be a grandfather.