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.
Dr. William Nugent
Dr. Christine Scofield
Dr. Edward Grey
Dick Rawdon
Dr. Al Marsdan
Dr. Burkhart
Resident Doctor
Ruth Conoyer
Mrs. Vanier
Roger
Dave
Leonard Pitt
Erich
Mrs. Stinnett
Ernest Lathrop
