what episode of pretty little liars does caleb come back?
Pretty Little Liars' Tyler Blackburn Talks Caleb's 'Dark' Return in 100th Episode. The Cat in the Hat is back! Hanna's ex returns to Rosewood on Tuesday's 100th episode of Pretty Little Liars (ABC Family, 8/7c), but Tyler Blackburn tells TVLine we should prepare ourselves for a whole new Caleb.