CRIMINALS WITHIN is another forgettable and worthless crime thriller from an era full of such films. It seems like producers didn't let a lack of money or talent put them off churning out B-picture after B-picture and this one is particularly devoid of enthusiasm. The hero is the brother of a mad scientist who gets killed by enemy spies. The hero decides to go hunting the spy ring himself but nefarious elements within the army are working against him. It sounds like it could get thrilling but it never is, going through all of the elements with a distinct lack of relish and featuring below par performances throughout. It's a real dud.