Aside from the Clown Mask Rapist episode of Little House on the Prairie or the child molester episode of Diff'rent Strokes, that is.
There was an episode of Cagney and Lacey that does still haunt me. It was a fairly gritty show for its time and they tackled plenty of controversial topics. The episode that I still think about after all these years. Doug Savant played a teenager who stole some booze from a liquor store while holding a fake i.d. that said he was over 21. He was afraid of his parents finding out he was arrested (!!??) so he stuck with the story that he was the person on his fake i.d. Well, because of that he winds up thrown in Riker's Island for the weekend where he his gang-raped by three or four men for FOUR HOURS in his cell. When Cagney and Lacey finally do track him down, he is understandably traumatized and from the looks of it is afraid to sit down in the questioning room because ... well he was just gang-raped for four hours. I never thought Savant was that great of an actor, but he certainly looked terrorized in that scene. The ringleader of the rapists turns out to be the Latino policeman from Barney Miller for God's sake. (The actor playing him, that is, not the actual person.) That's pretty terrifying in itself. Poor Doug Savant. From this role to being cast as Matt in Melrose Place, where he was often being beaten and abused by his boyfriends. Gay roles weren't that kind to him. At least he grew up and finally got a good role as hot daddy Tom on Desperate Housewives.
Is anyone else here haunted by creepy episodes of their favorite TV shows?