Some sources claim that Ben Gazzara's character suffered from leukemia. However, in a 1998 interview conducted by television book writer Ed Robinson, Executive Producer Roy Huggins indicated that the affliction from which "Paul Bryan" suffered was never mentioned on the program and does not exist.
The pilot aired on 'Kraft Suspense Theatre' (1963) Season 2, Episode 21, "Rapture at Two-Forty".
John Hoyt played the voice of the doctor in the opening-title sequence of the show's first two seasons.
Ben Gazzara and Robert Duvall appeared on 'Arrest and Trial' (1963).
Spoofed in Mad Magazine as "The Life of Your Run".