Rotten Rose: Part 1 (S02E05)

Marian is taken aback when her cunning former classmate, 'Rotten' Rose Scargill, starts getting close to Robin. Concerned, Marian confronts Rose about their lives as outlaws. However, Rose turns on them, revealing their whereabouts to the sheriff, leading to their capture and imprisonment. While in a torture chamber, Robin spots Marian seemingly getting cozy with Guy, who is infatuated with her and trying to impose himself. Misreading the scene, Robin jumps to the conclusion that Marian has betrayed him.