Marlena Evans is a fictional character from the long-running soap opera Days of Our Lives. She is portrayed by actress Deidre Hall and first appeared on the show in 1976. Marlena is known for her role as a psychiatrist and has been involved in various dramatic storylines, including romantic relationships and family dynamics. Throughout her time on the show, Marlena has faced numerous challenges, including being possessed by a demon, which became one of the series' most memorable plots. Her character is often depicted as strong, compassionate, and dedicated to helping others, making her a beloved figure among fans of the series.