S5·E19 Playing Doctor

Holly goes undercover as a drug addict, and Michael as her concerned brother, when a Marla Hess, a counselor for Safe Haven is found strangled to death in a patient's room. The main suspect is Alex Throne, the guitarist and lead singer of Head-On Collision, in whose room the body was found. But the suspect soon becomes Dr. Peter Vanguard, the man in charge of the clinic, when Holly discovers his rather unethical medical practices.