The supporting cast includes Bruce Lee, Gayle Hunnicutt, Rita Moreno, Sharon Farrell, Carroll O'Connor and Jackie Coogan.
The film foreshadowed James Garner's second Los Angeles P.I. character Jim Rockford in The Rockford Files.
As widely-panned as the movie was, Marlowe did one very significant thing right: it gave Bruce Lee his first major Hollywood break and helped to introduce him to American audiences. And as unfortunate as that fight scene was, it gave Garner, who did many of his own stunts over the course of his career, a chance to train with the martial arts master.
Garner clearly liked what he saw, because he soon joined Lee’s roster of famous clients like Steve McQueen and James Coburn and started taking private lessons in Jeet Kune Do, the martial art that Lee founded.