The Alfred Hitchcock Hour

Duke Marsden is an inveterate gambler who's about to lose his wife because of his habit. She gives him an ultimatum to either give up poker or else she's gone. He agrees, but there's one last thing he has to do first.

At a college campus, two young girls are killed while strolling through a nearby forest. Suspicion falls on a chemistry professor and an intense and brooding music professor named Edwin Volck. Harold, a psychology professor, convinces his fiancee Daphne to act as bait to help trap the killer. The trap succeeds and Volck is revealed as the killer. Harold, however, becomes worried. He believes that the killers bloodlust may have inspired other less obvious psychos on campus. Daphne realizes that Harold has been speculating about himself when he suddenly attacks her. She is rescued by the chemistry professor. The chemistry professor had been watching Harold's behavior since the beginning believing that he was a possible psychopath.

Jim Mallory is a forest ranger who along with his wife Linda, have adopted a girl named Anne. The couple have never told Anne that her parents died in a bizarre murder-suicide for fear that the news might disturb her. A blackmailer contacts Jim and demands money. He says that he will tell Anne the secret of her past if Jim doesn't pay up. Jim agrees to pay, but informs the police. The blackmailers figure out that something is up and change the site of the money drop. Later the blackmailers get into an argument and one of them is killed. When the police find the body, they suspect Jim Mallory. Jim manages to catch the blackmailer to clear his name, but he doesn't get to him in time to stop her from telling Anne the secret about her parents. Anne is troubled by the news, but manages to take it in stride. She tells the Mallorys that she loves them and has always considered them her real parents.

The mentally ill Dr. Fenwick is a supporter of the therapeutic value of role-playing in psychiatry. He kills the head of the sanatarium where he is a patient and assumes the man's identity. He locks doctors and nurses in the attic and gives their responsibilities to other patients. Things run rather smoothly until Natalie Rivers, the neice of the now dead head of the sanatarium, arrives for a visit. Since she has never seen her uncle before Fenwick is able to trick her into thinking that he is her uncle. Natalie discovers her real uncle's body and, not knowing who he is, asks Fenwick to call the police. He pretends to call the police and a patient pretending to be a detective shows up to look things over. Eventually Natalie discovers the staff locked in the attic. Fenwick tries to prevent her from telling anyone, but he is stopped by the police.

Larry Duke is an actor making his motion picture debut in Hollwood when he gets a phone call from his New York girlfriend Janice Brandt. Janice is an olderwoman who sacraficed her marriage and Hollywood career in order to advance Larry's career. She informs Larry that her husband Ed followed her to New York showed up drunk at her apartment and was knocked unconscious in a scuffle. Larry convinces Janice to smother Ed with a pillow so that she can come back to Hollywood. She agrees and reluctantly commits murder. In Hollywood, Larry calls the police and tells them about the murder in New York. He then head upstairs where he joins his new bride who he married to further advance his Hollywood career.

When his teenage son Tommy is found murdered in the town of Northfield, John Cooley sets out to avenge the boys death. John is a religious fanatic who believes he is on a mission from God. When he finds a piece of car headlight at the murder scene, he seeks out and kills the car's original owner Frency La Font and an elderly librarian who had some connection to the car. With all the murders, the residents of Northfield are unstandably shaken. They demand that Sheriff Will Pearce solve the case. Unfortunately, Pearce's girlfriend Susan Marsh falls under Cooley's suspicions since she bought the car from La Font. His attempt to kill her, however, is foiled at the last second by the timely arrival of Sheriff Pearce. Pearce explains that La Font murdered Tommy and confessed to it in his last will and testament.

Verge Likens is a farmer whose father was killed by a crooked politician named Riley McGrath. Verge returns home to avenge his father's death. He manages to get close to Riley by getting hired as an assistant at a barbershop. After asking the barber to run an errand, Verge is alone with Riley and proceeds to lather up the murdering politician for a shave. Verge vividly describes how he is planning to cut Riley's throat. When the barber returns to the barbershop he finds the door locked. He gets the police who break down the door. Inside they find Verge standing over Riley's dead body. Berge has avenged his father's death and he is not guilty of a crime. Riley died of a heart attack.

Over the protests of his wife Elsa, Keith Hollin rents a beach house. Elsa dislikes the house and is disturbed by her husband's digging of a gravelike hole in the basement. She is further disturbed when she finds out that Keith is seeing a local girl named Rachel. When Keith tells Elsa that he wants to buy the house, she decides to foil his plan by contacting the wife of the current owner to tell her to not to sell. Keith, however, grows angry and kills Elsa. He buries her body in the basement, but is surprised when the police arrive. The police carry shovels and want to dig up the basement. The police tell Keith that Elsa discovered the wife of the house's owner was missing. She tipped off the police and they began an investigation. They called the house's owner in for questioning and he confessed to murdering his wife. He told them that he buried his wife in the basement of the beach house. The police are at the beach house to dig up the basement so they can find the body.

Rusty Connors is a con man that has just been released from prison. He looks up the wife of his dead former cellmate, a robber and murderer, named Miles Krause. Before he was imprisoned, Krause stole a significant amount of money and killed his partner. The money and the body, however, never turned up. Connors talks to Krause's wife Helen and hopes that she knows where the money is. She, however, does not have a clue. Eventually, however, they are able to figure out that the money is stored in an abandoned boathouse that is now infested with rats. In the boathouse, they find the money and the dead and half-eaten body of Krause's partner. When Connors sees the money he is overcome with greed and tries to murder Helen. She manages to knock him out. When Connors awakens, he finds himself bound and gagged and being taunted by Helen. She gets up to leave with the money, but is tripped by Connors and is impaled on a hook. As she dies, the scent of her blood attracts the rats.