A social worker tries to break up a ring of crooks who buy newborn babies from teenaged mothers and sell them to couples who can't obtain them through legal adoption channels.

Nerdy Walter Paisley, a maladroit busboy at a beatnik café who doesn't fit in with the cool scene around him, attempts to woo his beautiful co-worker, Carla, by making a bust of her. When his klutziness results in the death of his landlady's cat, he panics and hides its body under a layer of plaster. But when Carla and her friends enthuse over the resulting artwork, Walter decides to create some bigger and more elaborate pieces using the same artistic process.

An ex-mafioso moves to Mexico to become a writer, revealing mob secrets in his books which are met with understandable displeasure. He is soon pursued by hit-men as well as the FBI, who need his testimony in a court case.

A group of scientists travel to a remote island to study the effects of nuclear weapons tests, only to get stranded when their airplane mysteriously explodes. The team soon discovers that the tests have given rise to crabs mutated into intelligent, impervious, telepathic giants intent on increasing their numbers by breeding, then travelling to populated areas to feed, and which do not intend to be stopped by their discoverers.

When an in-flight collision incapacitates the pilots of an airplane bound for Los Angeles, stewardess Nancy Pryor is forced to take over the controls. From the ground, her boyfriend Alan Murdock, a retired test pilot, tries to talk her through piloting and landing the 747 aircraft. Worse yet, the anxious passengers — among which are a noisy nun and a cranky man — are aggravating the already tense atmosphere.

A conflicted teen lashes out by vandalizing equipment at the nuclear plant where his father works, then hits the road and finds a spiritual path.

An ocean-side nightclub owner loves a singer who only has eyes for a gambler.

Discharged naval officer Dan Corbett moves to New Orleans and accepts a job as a longshoreman, unaware that the docks are run by an infamous racketeer. When the dock manager is murdered before he can notify the authorities of their criminal scheme, Dan coordinates with the police to go undercover and investigate.

Aliens equipped with venomous claws invade a small town, but the town's teenage population is mobilized to fight the menace.

A huge, alien structure resembling an inverted cone, appears in the woods outside a small rural town. Sent from Washington to investigate the origin of the mysterious object, a team of investigators discovers that intelligent parasites from inside the "cone" can attach themselves to humans' nervous systems and control their minds, taking control of the authorities and workers, making communication with the outside world impossible, and leaving the responsibility of stopping the invasion up to seven people who have thus far been able to avoid possession by these creatures from parts unknown.