Dane Clark stars in "The Man is Armed," from 1956, also starring William Talman, Hamilton Burger on Perry Mason, May Wynn, and Wagon Train's Robert Horton.
Clark is Johnny, a loose canon who has just been released from prison for a crime he didn't commit. The first thing he does is seek out the man he believes is responsible for his imprisonment and throws him off a building.
Johnny then goes to his old employer Hackett (Talman). It happens that he's in love with Hackett's secretary (Wynn) who is presently dating a doctor (Horton). She's happy to see Johnny. She has a choice between a criminal and a handsome doctor and every time someone asks her how she feels she says, "I don't know." Good answer.
It turns out that Hackett was the one who framed him and sent him to prison. He wants Johnny to pull of a huge heist for him and feels he can trust him. Why, I don't know. And why he framed him to go to prison, he doesn't explain either.
Nevertheless, Hackett has everything in place and puts Johnny in charge of planning the heist and giving orders to the other people involved. Johnny actually has partially written some sort of concerto - I bring this up because he plays it while Hackett is talking to him. Actually he plays it every time he's near a piano. And plays it. And plays it. The same melody.
It's pretty evident how this will go, since Johnny has a screw loose. Barton Maclane plays the police officer trying to catch the criminals.