Garth A7 (Michael Rennie) is sent back to groovy 1960s Earth to prevent Professor Marx (Eduard Franz) from developing a mind to mind communication system which in the future is used to enslave humanity. Unfortunately he only has a short time period to do it before sentinels from the future are sent to capture him. He enlists the help of Marx's assistant Dr Mason (Karen Steele) and her friend Dr Zellar (Warren Stevens) but the sentinels with their zap guns are already on the case...
A low-budget science-fiction film that makes the clever decision, budget wise, to base most of it's action on present day non-SF film sets and locations. Although the film's plot does plod a little at times, and can be a little cheesy, this is not a bad film at all. The idea behind the film is very good, no wonder it was later used again.
