If you seriously think that teaming up 2 of Hollywood's biggest, most bankable and hottest stars of the 1950s together in the same picture would totally ignite sparks of pure ecstasy flying this way, and that, then think again.
Unfortunately for us all - In "River Of No Return", any on-screen chemistry that was generated between Mitchum & Monroe amounted to being nothing more than a complete fizzle, and that was about all.
I'd say that a lot of this picture's glaring faults rested squarely on the shoulders of its demanding director, Otto Preminger, who obviously understood nothing about the advantage and benefit of filming its dynamically attractive stars in close-ups. In my opinion, close-ups are a vitally important part of producing a real quality picture.
Another serious problem that plagued this film's story was that way-way too many of its scenes set in the beautiful outdoors were actually shot in front of back-projection screens. This, to me, was a sure-fire way of thoroughly sabotaging an adventure film that featured such grand and majestic scenery as this one did.