After constant hounding from Fred, Mork agrees to move out of Mindy's apartment. But Mork's plans are complicated when he becomes drunk on ginger ale.
A cargo ship is destroyed, but the only witnesses, fisherman and his sons, are reluctant to tell G-Force what they know.
Chester and Dutch escape from prison, Carol tells Jodie that she is pregnant, and the Tates all disappear into the basement.
Off goes the moustache, as it's Harris' turn for cross-dressing mugging detail; the host of a kids' science show goes off the deep end; Barney's men reopen a twenty-eight year old missing persons case.
Everybody mourns the death of Grandpa Zeb and Flossie Brimmer. John struggles hard to fill a huge lumber contract and Mary Ellen & Erin move to Charlottesville and they get an apartment.
Finally getting to spend a bit of leave time with his latest flame, Barbara, Quincy heads off away from Los Angeles. They nearly get run off the road and then witness an accident. Quincy then finds himself in a life or death race to isolate a mysterious poison, found in the woman's body, that has already claimed two lives
The Sweeney get incorrect information from informants, allowing a gang of villains to make off with some contraband alcohol.
Abby has her own problems when she thinks sha may be pregnant and is relucant to tell Tom. Tom panics when he finds out he is going to be audited by the I.R.S, and the family pitches in for help. Nicholas plays post office for the first time.
Prompted by Helen, Louise begins taking an art class. However, when George discovers she's been sketching models who pose in the nude, he tries to get her to stop attending class.
Zoltar attacks Earth's power plants with a tentacled mech, but when G-Force attacks, the Phoenix experiences malfunctions.
Jill's old flame Paul Ferrino persuades her to drive his experimental car in a Grand Prix, hoping that a victory will bring needed research funds. A mysterious explosion sets the Angels in motion.
Tony is ecstatic when a lucky punch of his brings a boxing champion to his knees.
Richie is able to stop the out-of-control horses that are pulling a wagon Joanie is in. With the deadline looming, the gang is still short $1017.38 for H. R. Buchanan's note, so Fonzie volunteers to ride a killer bull for a $1000 prize.
When they blow the capture of a wanted felon, Starsky and Hutch each blame the other, and lay down a bet to see whether or not Hutch can successfully elude Starsky for a whole weekend. But the exercise in hide-and-seek becomes more than just a game when Starsky realises that Hutch has unknowingly eaten contaminated soup, and could die from the potentially lethal botulism poisoning. It's a race against time as Starsky struggles to locate Hutch to warn him, but Hutch, unawares to the poisoning, assumes it's all part of Starsky's attempts to draw him out, and dons a number of disguises in order to stay one step ahead...
On Space Island, a colonized asteroid, a Lava Giant suddenly appears and goes on a rampage.
With Barbarino now an ordlery at a hospital, the Sweathogs try to get jobs there, too. Meanwhile, Kotter tries to get the gang to return to school.
A team of scientists on Earth develop the Jet Cutter, a new laser to powerful enough to cut through a new indestructible metal that Spectra has developed. But Spectra uses a giant humanoid mech to steal the Jet Cutter. G-Force travels to Zyr to try and find the giant and recover the laser.