' Pretty Little Liars ' Creator Breaks Down the Series Finale and It's the end of an era for Freeform's long-running show Pretty Little Liars. Spoiler zur Serie Pretty Little Liars. Achtung Spoiler zur Serie Pretty Little Liars nur lesen, wenn das OK für Dich ist. ' Pretty Little Liars ' showrunner Marlene King answers TVLine's burning questions from the show's series finale — and not just about A.D. She gets lost in the game, and we wanted her to win the game. Elizabeth Wagmeister TV Reporter EWagmeister. And leaves you wanting more with a spinoff for once in life. OK, time to discuss: The whole background story regarding Bethany was never revealed!