I'm surprised that I'm the first to bring up on here that Barbara Billingsley had a bit part as the editor's secretary. One of the fun things about watching movies from yesteryear is seeing who's going to turn up in unexpected places.
I only noticed Barbara Billingsley in the credits AFTER I thought I had heard Hugh Beaumont's voice during the part where the psychiatrist first showed up on the scene, but there's no mention of him in the credits. Strange indeed. Also, Robert Young's older brother Roger Moore (no, not 007) is an extra in this film. Apparently he was in over 200 titles, always uncredited.