Fringe (2008)

S3E19 Lysergic Acid Diethylamide

Peter, Walter, and Bell venture into Olivia's subconscious in a desperate attempt to extract Bell's consciousness from her mind. Their mission is to locate and retrieve Olivia's true personality, which has cleverly concealed itself in a secure location within her psyche. As they navigate the intricate landscape of her mind, they face various challenges and obstacles, all while racing against time to restore Olivia's identity and free her from Bell's influence.