McGarrett must again face mobster Charlie Bombay when a plane carrying them to Honolulu crashes in the forests.
The City plans to demolish Ed's garage to open a newer, more enhanced power gas station.
The cases of an easy-going ex-convict turned private investigator.
Aunt Esther is fed up with her husband, Woodrow and has decided to end her marriage. She has become convinced that he's seeing other women behind her back and becomes even more convinced when Fred tries to hook him up with a swinger. Refusing to live in the same house with Woody, Esther moves in with Fred and Lamont.
Frank settles in as commanding officer, only to have a new one appointed over his head, one that, to his chagrin, fits in very well.
A confidence trickster comes to stay at the hotel, just after Basil has taken an ad in a posh magazine to upgrade the clientele.
Godfrey's cottage is due to be demolished to make way for a new airfield but no-one can bring themselves to break the news to him until Jones finds out that he already knows. In the end Frazer, knowing the family history of the General in charge, bribes him to get the airfield moved 200 yards. This results in some rather amusing consequences. The door to Mainwaring's bank office is replaced with a paper door, apart from the insult of not having a proper door Mainwaring is even more annoyed at the fact that Pike the Colonel and Jones manage to destroy it within minutes of it being installed.
The Moon is on a collision course with an enormous planet. On a scouting mission, Koenig encounters Arra, the Queen of Atheria. The aged monarch proclaims the collision is a preordained event and must occur for her people to evolve to a higher plane of existence. Now Koenig must convince his staff to have faith and do nothing in the face of apparent destruction.
While a psychopathic killer uses San Francisco hi-rises as target practice, Stone and Keller have to contend with a new Captain who immediately countermands everything they do.
Weary of housework, Liz tries her hand at social work, to Barney's dismay; a master forger fascinates Harris.
John-Boy's Dean asks him to take care of a 16 year old genius college student for the weekend. It seems that Lyle is wonderful with science and math, but woefully lacking when it comes to dealing with people.
Wealthy used-car dealer Zack Tyler and his wife stop to help two men seemingly having car trouble, only for the two thugs to rob Zack, and rape and murder his wife. Starsky and Hutch work all out using their underground contacts to track down the two murderers, but they don't quite realise that once they have found the culprits, that Zack intends to get even with his wife's killers by taking the law into his own hands.
Baretta has to go on the run to clear his name after he is framed for the murder of a gun dealer he was investigating, who was selling weapons to teenagers.
Mary is beginning to do worse in school because she has a hard time reading the blackboard. When Mary first gets her new glasses, she really likes them. The other school children begin to tease her. She purposely loses her glasses, until she realizes that her teacher, who wears glasses, has a boyfriend.
Fonzie finds his his bike in pieces, and the search is on to find out who did it.
Gabe insists that basketball ace Washington pass his social-studies test.
An informant of Regan’s tells him about a hijack involving a lorryload of cigarettes where he will be the look-out man. But can Regan trust his snout?