"Screen Director's Playhouse" broadcast a 60 minute radio adaptation of the movie on June 21, 1951 with Edmond O'Brien reprising his film role.
Film debut of Neville Brand.
Film debut of Beverly Garland (billed as "Beverly Campbell").
The Life magazine displayed at the San Francisco newspaper stand where Frank Bigelow stops is the publication from September 12, 1949, with Yugoslavia's leader, Marshal Josip Broz Tito on the cover.
The scene in which Bigelow runs in panic through the streets after learning he has been poisoned was a stolen shot. The pedestrians had no idea a movie was being made and no warning that Edmond O'Brien would be plowing through them.
When Frank Bigelow registers at the Allison Hotel in Los Angeles, the name directly above is Russell Rouse, one of the writers. Also on the register is Ernest Laszlo, the director of photography and Marty Moss, the assistant director.