After he tries to stop a runaway car, the son of a former cop and friend of Captain Greer is charged with stealing the vehicle. Then it is learned that the car, which belonged to a judicial candidate's campaign worker, was also involved in a hit and run. The trio goes undercover at the candidate's headquarters to further investigate.

The Squad goes undercover on a movie set to aid a director whose film is being sabotaged. The film is based on a real life murder case from twenty years before that Greer worked on.

Pete visits his Beverly Hills home to try to help his old girlfriend, who believes her father is being kept in a mental ward against his will and manipulated by her uncle and cousin. While there, Pete also reunites with his mother.

Janny Wills, first introduced in the first season episode "A Hint Of Darkness, A Hint Of Light", invites Linc, Pete, and Julie to meet her new fiancé, Dr. Frank Tarver. Tarver doesn't tell them that he is being threatened by a man blaming him for his daughter's death. But when the trio investigates further, they find that Tarver may not be who he seems.

As the trio reminisces over two years together, and Pete considers quitting the group to work with his father, an old nemesis arrives: Beau Graves, one of those they helped put in jail in the premier episode. He has just been paroled and has come seeking revenge against the trio.

A set of rosary beads found on a corpse are traced to a young novice, who witnessed her father, a Syndicate figure, commit the murder. The Squad tries to help her sort out the situation, while higher-up mobsters from out of state plot to kill the girl.

Pete's fraternity brother Curtis Bell casually tells him that he's going to kill a girl. When that very girl is found murdered, the trio investigate. Curtis happily tells them just how the murder was committed. But Pete and the others wonder if he really killed her, or is just trying to get attention from his neglectful mother.

A founder of a halfway house for drug addicts is wrongfully accused of statutory rape of a minor. Pete and Linc work undercover as tenants to find the person who framed him.

Julie's romance with a charming foreign exchange student turns dangerous when it's revealed that he's really a Middle Eastern Prince who's targeted for assassination by emissaries from his country.

While on a motorcycle trip to Mexico, Pete and Linc are detoured by a biker gang into a border town and held hostage along with all of the town's residents. The gang refuses to leave until they find out who in the town killed two of their members.

Chief Metcalf asks the squad to find his daughter, who has left home despondent after the death of her fiancé in Vietnam. They find her, addicted to drugs and part of a decadent rock star's coterie.

An embittered handyman kidnaps Julie, mistaking her for the daughter of the woman who fired him.

After a young man helps Pete when he is attacked by hoodlums, Pete learns the man's father may be plotting a serious crime. 

Pete, Linc, and Julie go undercover to trap a suave, charming veteran con man. His latest targets are three gullible elderly widows.

When Pete and Linc's friend Sol Alpert finds his business vandalized, he then learns it was done in protest over living conditions in ghetto housing owned by his own cousin. Sol decides to fight his cousin to get improvements in the housing, and with Pete, Linc, and Julie's help decides to bring the matter to a Jewish court.

The Mod Squad sets to work busting an extortion racket run by a self styled healer responsible for the death of Linc's friend. Julie befriends a wheelchair bound man paying large sums for empty promises that his paralysis will be cured.

Pete, Linc and Julie go undercover at Sims College to investigate a frat boy's mysterious death. Pete plays a running back, Linc an African exchange student, and Julie the object of desire for the star quarterback.

Julie goes undercover as a country singer at a wayside inn while Pete and Linc investigate the suspicious death of a faded country western star.

An illiterate small time crook gets caught when he can't read the sign warning of danger. The squad rallies to help him if he cooperates with the law and snitches on his partner, who is responsible for the death of the security guard.

As dissident students prepare to demand changes in a school policy, a black student is found murdered on campus and the Squad is called in to investigate.

The squad is unaware that the writer they are assigned to protect has a split personality.

Linc is initially bummed about having to get his driver's license renewed until he meets the examiner. They start dating but a man from her past comes back into her life and causes problems.

While on vacation Pete befriends a woman who tells him her brother is missing. When she is found dead he's charged with her murder.

Greer falls in love with an attractive widow, unwittingly making her the kidnapping target of a narcotics gang.

Julie takes in a young, apparently destitute, Mexican boy, not realizing that he is connected to a couple of thieves who don't want him talking to the wrong people.

Capt. Greer reluctantly enlists the aid of a psychic to help find a kidnapped coed.