The cases of an easy-going ex-convict turned private investigator.
In another get rich quick scheme, Fred decides to go down to an escort service with a friend of his and try to apply as escorts. Flatly rejected, Fred decides to open his own escort service complete with false advertising which results in Fred having to escort three ladies in one night.
The wandering Moon suddenly changes course and comes to a halt in the vicinity of a dead world. As Alpha's power fails, the only hope for survival is to evacuate to the planet, which was ravaged by a nuclear war in the distant past. Searching for answers, a team is sent to the surface, where they discover the shocking truth of the origin of Mankind.
Wentworth is furious when Chano gets the credit for her bust of an assassin at a block party.
The son of a Japanese businessman is kidnapped and held in a capsule underwater until a $1.5 million dollar ransom is paid...
Kotter and the ""Sweathogs"" raise a telethon to raise $700 for new supplies. If not the remiedial class will be cut.
A quilting is to announce that a woman is of marrying age. Grandma is determined to have one for her granddaughter Mary Ellen who is just as determined not to participate in what she considers an insulting custom.
Mary, Laura, and Mr. Edwards' adopted son, Carl, go along with Charles and Mr. Edwards to a train station. The three children wander into the caboose. The caboose then begins to move backwards, going faster and faster. Another train is coming the opposite direction...
Chico's blind, skirt chasing, singer of a cousin visits Chico and meets Ed.
Hawkeye is reunited with a woman he thought was out of his life forever, but who never altogether leaves.
Richie, Potsie, and Ralph stage a beauty contest at Arnold's in order to meet girls. They plan to enter a plant into the contest who won't accept the prizes when chosen as the winner. Richie is uneasy about this but reconsiders when a cheerleader he's interested in enters.
Tom's new life with Theresa begins to bring the happiness that has eluded him. Theresa gives birth to their son, Wesley, and Tom achieves early success as a prizefighter. Upon graduation, Rudy begins his business career after a surprising meeting with Duncan Calderwood. Rudy has since met up with Julie again. After an awkward reacquaintance, Rudy learns of the difficult choices Julie must now make in her life.
Maude stages a tribute to American women for the Tuckahoe Bicentennial celebration. All the men are convinced it is a money losing proposition.
Energetic Justin Quigley inspires Archie to stick with the strict diet his doctor has recommended.
When Oscar assigns Steve Austin to protect the priceless Golden Pharaoh statue, they find it has already been replaced by a fake.
The crew of Los Angeles County Fire Department Station 51, particularly the paramedic team, and Rampart Hospital respond to emergencies in their operating area.
Mary's Aunt Flo and Lou both prepare competing ideas for a TV documentary.