Upstairs, Downstairs (1971)

Season 1: Episode 6

October 1906: Mary, the new housemaid confides in Richard that she's pregnant, the result of an assault by a man who drunkenly forced himself on her. Insisting he must bear responsibility, she reveals the man is Myles Radford, the son of Richard's friend (and her previous employer), General Radford. Myles, outraged that Richard has the gall to question his integrity, gets even with a classless move that could have enormous legal, financial, and moral ramifications.