"You May Be Next!" is a B-movie that manages to be a bit better than normal, thanks to a most unusual plot.
Neil (Lloyd Nolan) is an expert on radios and one night he's scouting out locations for a new radio tower. However, he isn't too careful and his equipment ends up jamming all the local radio frequencies...including the police's who are looking for a gang of crooks. As a result, the crooks make a clean getaway. But the leader of these crooks learns about Neil's mistake and he decides to steal Neil's equipment and kidnap Neil to start a reign of terror...and profitable crime.
The story is interesting and as you'd expect, Nolan is quite good in the lead. Not a must-see story, of course, but a dandy B-movie that is entertaining and better made than you'd expect. My only complaint is the leading lady. Neil thinks she has an amazing singing voice and wants to make her a radio star, though I think she sings worse than my dog when she is lonely and starts to howl!