Jenna Ryan was the understudy of Gail Fleming whom she framed for murder in Mr. Monk Goes to the Theater. Together with her father, Ryan had Hal Duncan killed and framed Gail for it. She put peanut oil on an apple that Duncan's character, Burt, bit into. She then made it look like Gail stabbed Duncan on stage with a real knife, with her father acting as a doctor who declared Duncan dead. Adrian Monk, Duncan's replacement, was able to prove Ryan's father killed Duncan after Gail's sister Sharona found the peanut oil in her room.