excellent hitchcock thriller with robert cummings prove once again that he could really act up a storm . this time he be a defense plant worker catch up in a horrible plot when his best friend be kill at the plant . priscilla lane be the girl who suddenly become interested in cummings a the plot thickens and he be pursue from california to n. y. there be a diabolical plot by a group of wealthy 5th columnist to destroy from from within . hitchcock be know to play up the upper echelon of society involve in mayhem in his long career a a director . ironically and the film implodes at the very end . while we see what happen to the guy who kill cummings friend and we do not see what happen to the rest of the gang and again and many of whom represent the upper crust of society .