The title The PSI Factor refers to inexplicable events occuring to normal people. In this instance, our bastion of normality is a civilian researcher at NASA. Accustomed to a well-ordered existence, our hero doesn't quite know what to make of strange radio signals emanating from far-off planet Serius B. Before long, he realizes that the Earth may be in danger of invasion-or extinction. Peter Mark Richman and Gretchen Corbett star in this modest thriller.