
An architect is convinced there are aliens in the world.

A communist delegate calls for Vincent's help when an alien intruder is caught inside the building; guests Dana Wynter, Fritz Weaver.

A pretty psychologist (Carol Lynley) offers Vincent a chance to escape when extraterrestrials capture him for interrogation.

Aliens threaten Earth with severe recrimination if Vincent does not release a high-ranking alien hostage (Alfred Ryder).

Aliens infiltrate a publishing empire as the first step in taking over the nation's news media; guest Kent Smith, Nancy Kovack.