Beau Graves is released from prison after the trio put him there two years ago. Pete is trying to decide whether or not to quit the trio and work for his dad. Flashbacks to previous episodes after Linc is shot make it clear to everyone the importance of their ""family"".

Tenants revolt against a racist slum lord and threaten the wrong person. Trio confronts the slum lord to no avail, until interventions from the Rabbi Tannenbaum convince him otherwise.

Disturbed handyman kidnaps the daughter of his employer, believes that Julie is the daughter. Ends in a showdown.

Sammy Davis Jr. plays Billy Lee Watson, a recovered drug addict who is accused of statutory rape by his alleged victim's father, who wants to close down the halfway house Billy has been appointed director of. Billy was trying to help the girl, who is herself addicted, and pregnant.

Julie poses as a singer at a Country Western bar to find out the real reason behind Wild Bill Hannachek's death.

Pete's fraternity brother is framed for murder.

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.

Pete tries to help a young woman and winds up the chief suspect in a murder. The team sets out to clear Pete of an obvious frame-up.

Secrecy and compassion are called for as the squad ministers to the runaway---and drug-addicted---daughter of the chief. Quinn: Noel Harrison. Elizabeth: Renne Jarrett. Metcalf: Simon Scott. Julie: Peggy Lipton. Linc: Clarence Williams III. Pete: Michael Cole. Greer: Tige Andrews.

Linc battles conflicting emotions as he follows a hunch regarding the integrity of blind Janny Wills' fiancé. Janny: Gloria Foster. Tarver: Ivan Dixon. Linc: Clarence Williams III. Edwards: Karl Swenson. Pete: Michael Cole. Julie: Peggy Lipton.

Pete, Linc, and Julie go undercover working on a film project on which strange accidents have occurred. The film is based on a twenty-year old murder mystery, and the director believes the real killer is trying to sabotage it because he fears his identity will be revealed.

During a campus demonstration a student protester is found dead. The protesters think he was killed by the police and the police think he was killed by another student.

Thieves send a little boy to do the stealing and reap the rewards. Manolette runs away and the trio help him find a new home.

A narcotics gang kidnaps Greer's girlfriend, widow of an FBI agent. In trade they want squealer Crowley who is testifying against them.

An illerate 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.

A clairvoyant's prediction about a missing college student leads to an illegal abortion ring.

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.

Con artist Admiral Nathaniel Johnson takes on the trio and teaches them the art of the con. They comply and become enamored of the Admirals ways and realize too late they are being conned themselves.

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.

Pete's concern for a former girlfriend's problems involves him in her family's corporate power struggle---and a reunion with his mother. Claire: Margot Kidder. Doug: Mark Goddard. Pete: Michael Cole. Linc: Clarence Williams III. Julie: Peggy Lipton. Greer: Tige Andrews.

Pete befriends Joey Kovacs, a youth whose father escaped from a mental institution and has vowed to kill a man who cheated him years before. Kovacs: Nehemiah Persoff. Doris: Marj Dusay. Pete: Michael Cole. Sanders: Ross Elliott. Franklin: Peter Brown. Linc: Clarence Williams III.

Linc's new love is evasive and secretive about her past which places a strain on their budding relationship.

Julie falls for Ari Nassal, unaware that he's a Middle Eastern prince involved in a fierce power struggle that could take his life. Julie: Peggy Lipton. Hakim: Ben Aliza. Pete: Michael Cole. Linc: Clarence Williams III. Sarif: Lawrence Dane.

Julie enters a convent to protect a young postulant who witnessed a murder. Melissa: Lynn Loring. Laker: Bert Freed. Julie: Peggy Lipton. Capp: Don Dubbins. Linc: Clarence Williams III. Pete: Michael Cole.

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.