In a 2007 interview, director Charles F. Haas talked about helping Jock Mahoney, the star of this film, not be upstaged by a young David Janssen, whose gifts he recognized. "In a picture at Universal [this one], I had David Janssen. I had him with [Jock Mahoney], who . . . was basically a stuntman. Stunts were easy for him, but as an actor he lacked a certain energy. So I couldn't afford to have David Janssen as his assistant, but he was under contract at Universal, and I had to [use] him. So I had him leaning against a door in every scene. He never understood why. The reason was, if I hadn't had him leaning against a door in every scene that he was in, he would've outdone [Mahoney], who was the star."
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