Dr. Bill is a syndicated radio host and a book author. He is first mentioned in "Chrysalis" when Max finds a maternity book written by him in Dana's room. In the alternative timeline, there are books about being a good father and mother, found in Joyce's and William's bedroom. Chloe also compares Max to Dr. Bill when Max asks her how her parents are doing. Sean Prescott suggests contacting Dr. Bill in order to deal with his son Nathan's mental problems. A book about rage control can be found in Nathan's room.