The Alfred Hitchcock Hour (1962)

Season 2: Episode 7

Miles Crawford is a former actor turned lawyer. He gets an oppotunity to practice both professions when his son Tod is arrested an put on trial for murder. Tod is guilty but Miles makes an impassioned summation that manages to sway both the judge and the jury. Unfortunately, the prosecutor is a movie fan and he points out that Miles's summation was lifted word for word from a old movie in which Crawford played a defense attorney in charge of a case very similar to the one he is in charge of now.