Inspectors for the U.S. Public Health Service try to track down the cause of a rash of mysterious ailments suddenly appearing among the general populace.

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Main Cast: Robert Urich, Maureen Reagan, Jack Hogan, Jed Allan, Alfred Ryder, Harry Townes, Lillian Lehman, Corinne Camacho, Anne Whitfield, Jackie Coogan

Directors: F. Bud Mautino, Richard Quine

Writers: Robert A. Cinader, Preston Wood

Editors: Robert Watts, Chuck McClelland

Cinematographer:

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