Brown is a chronic gambler and bigamist who starts to run out of money when his wealthy wives start turning up dead. The police suspect that he is responsible for murder, but when no evidence turns up they are forced to conclude that each death was a suicide. The real murderer is one of Brown's wives who jealously wants to keep her husband all to herself. She tells him that if he strays again she will commit suicide and she will arrange for him to be charged for her murder and the murders of his other wives.

James Parkerson is a psychology professor who places an ad in the newspaper offering advice on how to murder one's spouse. He gets a response from the police, but manages to convince them that he is merely gathering research for an experiment. Later, he is contacted by a man named Robert Johnson who is searching for a way to kill his lover's husband. From Johnson's description of his lover and her husband, Parkerson realizes that Johnson is talking about his wife Doris and himself. Johnson is planning to kill him, but doesn't seem to realize that his target and the man on the phone are one and the same. Parkerson hires a hitman named Bingham to kill Johnson. Unfortunately, Johnson kills the hitman. Johnson realizes that Parkerson knows about him so he contacts Doris. He tells her that they should kill Parkerson and then make it look like the hitman did it. Unfortunately, Doris still loves her husband and has no plans to kill him.

Donnelly Rhodes (as James Bellington) Lonny Chapman (as Lt. Wymar) Lou Jacobi (as Dr. Glover) Neile Adams (as Sgt. Louise Marklen) Jess Kirkpatrick (as Thomas Grindley) Sandra Gould (as Secretary) Betty Harford (as Woman in Museum) Harold Ayer (as Salesman) Police become suspicious of an unsuccessful artist named James Bellington after a city commissioner of parks and recreation recieves a series of bomb threats. Bellington tries to met the official. Since he is carrying a box that might be a bomb, the police stop him. They discover that the box only contains art supplies. Later, at an art museum Bellington is again stopped for carry a suspicious package whcih turns out to be harmless. The police force Bellington to see a psychiatrist and Bellington tells the psychiatrist that his next bomb threat will be real. The police stop a bomb carrying Bellington at the museum. He gives everyone in the museum ten minutes to get out and they do.

Charlie Osgood has been robbing his partner Eddie Turtin for years. When Eddie finds out, he threatens to go to the police unless Charlie can give him back what he stole. Determined not to ply, Charlie and his girlfriend Danielle decide to fake Charlie's suicide and then leave the country. Charlie gives Eddie hints of suicide and then throws an explosives laden dummy over a bridge. After blowing up the dummy in the water, Eddie becomes convinced that Charlie is dead. Eddie gives the eulogy at Charlie's memorial service as Charlie heads to the office to pick up his stolen cash. He grabs the money and, afterwards, he and Danielle celebrate with drink. Charlie passes out after the drink and awakens to find Eddie and Danielle. Charlie realizes that he has been set up. Eddie planned to take the money and blame the theft on his dead partner. Eddie and Danielle get rid of Charlie for good by pushing him off a pier and blowing him up in the water.

Brother Thomas Fitzgibbon is a bumbling medical missionary that is living in India with his scheming wife Mary. When a new missionary Brother John Sprague and his wife Lucy arrive and disturb Mary's ambitious plans for her husband, she decides to kill them in order to protect her family's future.

After Robert Manner's attempt to kill himself is ruined by a fireman's net, he is invited to join a suicide club headquartered at the Thanatos Palace Hotel. The members of the club have agreed to kill each. The catach is that the victim never knows who the killer will be and never knows when the murder will occur. Robert joins the club, but falls in love with one of its members Ariane Shaw. He gets a new lease on life and decides to undermine the club in order to prevent his own death.

Walter Mills is shocked when his fiancee dumps him. When she tells him he is too dull, Walter decides to change his image. He buys a wig and a beard and pretends to be Philip Marshall. As Philip he meets Noreen Kimberly. He promises to teach her how to sail. Noreen's boyfriend Curly, however, becomes angry and does some digging. He finds out that Philip is really Walter and he threatens to tell Noreen unless Walter hides some stolen jewels for him. Walter accepts and hides the jewels in sack inside his boat. Feeling guilty, Walter tells Noreen everything. She tells him that she really is in love with him. Noreen tells Walter to get rid of the jewels. As he heads to the boat the police arrive. They open the sack and find the remains of Noreen's husband. The police inform Walter that they were tipped off by Noreen and Curly. Walter realizes that it was all a set up as he is being taken away by the police.