This science fiction tale of doom and gloom was one of the earliest from Roger Corman, who produced and directed. While at times being a bit slow and predictable, the film features some fine talent. It stars Richard Denning as the heroic scientist hero--a role he was certainly no stranger to performing, the lovely Lori Nelson as one of the atomic blast survivors-Louise Maddison who is as far as the two leading men(Rick & Tony-played by Mike 'Touch' Connors)in the cast and even the mutant monster in the film are concerned the most desirable woman alive as far as they know. The Mutant Monster is another Paul Blaisdell brought to life on screen by Blaisdell himself. Despite looking a bit rubbery, it does have a real menace about it. Mike Connors is decidedly unsympathetic and uncaring as the two-bit hood Tony(who only wants to take and is concerned only for satisfying his own twisted desires). Paul Birch and Adele Jergens are also quite good as Maddisson(the concerned father who tries to maintain the safety of the group and fend off Tony) and Ruby(Tony's loyal kind-hearted girlfriend with a shady past). For a low budget film effort, this one is really quite good.