| Actor | Bobby Van (as Danny), James Craig (as Dr. Haines), Grant Williams (as Maj. Kurt Mason), Henry Wilcoxon (as Dr. Christopher Perry), Casey Kasem (as Control Officer), Denny Miller (as Col. Don Price), Mike Farrell (as Reporter), Ted Markland |
| Actress | Ruta Lee (as Dr. Marion Turner), Mala Powers (as Maj. Georgianna Bronski) |
| Director | Lee Sholem |
| Links | https://www.imdb.com/title/tt0061592/ · https://en.wikipedia.org/wiki/Doomsday_Machine_(film) |