As a result of an arctic nuclear test, a carnivorous dinosaur thaws out and starts making its way down the east coast of North America. Professor Tom Nesbitt, only witness to the beast's existence, is not believed, even when he identifies it as a "rhedosaurus" to paleontologist Thurgood Elson. All doubts disappear, however, when Elson is swallowed whole during an oceanic bathysphere excursion to search for the creature. Soon thereafter the rhedosaurus emerges from the sea and lays waste to Manhattan Island until Nesbitt comes up with a plan to try to stop the seemingly indestructible beast. Written by Doug Sederberg [email protected]

Frank Johnson (Ross Elliott), sole witness to a gangland murder, goes into hiding and is trailed by Police Inspector Ferris (Robert Keith), on the theory that Frank is trying to escape from possible retaliation. Frank's wife, Eleanor (Ann Sheridan), suspects he is actually running away from their unsuccessful marriage. Aided by a newspaperman, Danny Leggett (Dennis O'Keefe), Eleanor sets out to locate her husband. The killer is also looking for him, and keeps close tabs on Eleanor. Written by Les Adams [email protected]

In the Arizona desert, Professor Gerald Deemer is experimenting with growth hormones in the hopes of finding a way to increase the world's food supply. His partner in the project was recently found dead in the desert, suffering from a disease that normally takes years to advance but, in his case, seems to have afflicted him in only a few days. The local doctor, Matt Hastings, is puzzled by the strange case and, with Deemer's recently arrived (and very pretty) assistant, Stephanie Clayton, tries to figure out what is going on. When cattle remains are found in the countryside, evidence points to a giant tarantula as the culprit. Written by garykmcd

En route to Normandy, an American and a British officer reminisce in flashback about their romances with the same woman.