Made during the Atomic Age, Cold War, Spy era of the late 50s/early 60s, The Amazing Transparent Man (1960) plays off of the paranoia of the time.
Scientist Peter Ulof is the unwilling participant in the plan of the mad Major Krenner. Krenner is holding Ulof's daughter hostage while Ulof perfects a machine that renders life forms invisible through atomic radiation. Krenner plans to create a whole invisible army and sell the transparent mercenaries to the highest bidder.
The only problem is... they need more radium to complete the plan in it's entirety. So, Major Krenner manages to break a safecracker, Joey Faust, out of prison with the help of a beautiful female accomplice.
The hope is that making Faust invisible, he will be able to steal deposits of radium from various vaults.
Faust has other plans, though. This new invisible state gives him the idea that robbing banks without being seen will be a much more lucrative venture. But despite being invisible, he somehow manages to have an altercation at every attempt.
Faust sets to double cross Krenner along with his new lovely partner. Their scheme is not inconspicuous enough, though, and Krenner senses there is something amiss.
Meanwhile, the invisibility formula isn't quite working according to intent (he becomes visible sporadically) and Orlof seriously questions the moral implications involved in his research...
The Amazing Transparent Man- movie trailer