In "The Escape of Lacey Abbott," William Powell stars as a psycopathic patient who escapes confinement to search for the man who betrayed him.
As the episode opens, Lacey Abbott impersonates his attorney and signs his way out of Bellevue Hospital. For the first time in two years, he is free. However, his primary goal is to find the man who put him in Bellevue, Martin Avery. Lacey was convicted of murdering his wife, but Martin Avery was the real killer.
Lacey easily buys a gun from a pawnbroker and heads over to Park Avenue. He then walks into Avery's home and takes him hostage at gunpoint.
But, now that he has Martin Avery cornered, what exactly does Lacey want?
"The Escape of Lacey Abbott" was written by Gilbert Thomas, directed by Norman MacDonnell, and produced by William Spier. William Powell starred. Also appearing were John McIntire, Lurene Tuttle, Howard McNear and Sidney Miller. This episode aired on January 19, 1950.
(As Stacey pointed out in the comments, this story was presented a second time on March 8, 1959 with Myron McCormick in the lead role.
(Image of William Powell from Wikipedia)