Harold Gern, a shady businessman from New York, is spending a holiday in Puerto Rico with his attractive wife Evelyn. They are joined by Martin Joyce, Harold's lawyer, who has come to discuss the latest indictment. Harold invites him along on a boat trip during which all three try out some newly bought scuba diving equipment. When they resurface, they find out that the world has changed forever.
A mad scientist changes his simple-minded handyman into a werewolf in order to prove his supposedly crazy scientific theories - and exact revenge.
An expedition in the South Pacific lands on a tropical island where the natives worship the mysterious deity Gappa. An earthquake opens up an underground cavern and a baby reptile is discovered inside. The natives warn the foreigners to leave the hatching alone, but they don't listen and take it back to a zoo in Japan. Soon after, moma and papa Gappa start smashing Tokyo looking for their kidnapped child.
Ruth Earlton has come home to her ancestral mansion to claim her inheritance. Accompanied by her boyfriend, she discovers that her father died suddenly under suspicious circumstances. Now it's her turn, as her deranged and relentless uncle targets her for death with the help of his wife and son, plus a very unhappy ape.
A sadistic count tortures and murders his unfaithful wife and her lover, then removes their hearts from their bodies. Years later, the count remarries and the new wife experiences nightmares and hauntings.
An insurance salesman, Albert Tuttle, is hired as a body guard for a millionaire.
Rival newspaper reporters Pat Morgan and Ted Rand find themselves unraveling the mystery behind the death of a millionaire philanthropist who fell from his penthouse balcony. When it is discovered that the plunge was not an accident, the building's residents come under suspicion. Soon, the body count begins to mount as three more murders occur by strangulation.
A district attorney and a reporter try to find the killer of a D.A. who uncovered a massive stock fraud.
A gypsy seductress is sent to sway a goofy officer to allow a smuggling run.
A womanizing city man meets Tillie in the country. When he sees that her father has a very large bankroll for his workers, he persuades her to elope with him.
Edna's father wants her to marry wealthy Count He-Ha. Charlie, Edna's true love, impersonates the Count at dinner, but the real Count shows up and Charlie is thrown out. Later on Charlie and Edna are chased by her father, The Count, and three policeman. The pursuers drive off a pier.
A spoiled rich young woman overspends from her parents' savings and ruthlessly vamps on young men that she calls up randomly on the telephone. When her fianc�e and his friends get word of this, they hatch a plan to teach her a valuable lesson.
