The Alfred Hitchcock Hour: Isabel (1964)

Synopsis
Sentenced to 15 years in prison for a crime he did not commit, Howard Clements (Bradford Dillman) is released after serving only two years. Shortly afterward, he pays a visit to Isabel Smith (Barbara Baxley), the woman whose testimony put him behind bars. Though Isabel is worried that he seeks revenge, Howard explains that he is now running a successful business, and is willing to let bygones be bygones. Ultimately, Howard and Isabel are married...but if you've guessed that this is not the end of the story, your guess is right on the money. ~ Hal Erickson, All Movie Guide