After Tom has shown Nancy his discovery they return to see Wendy,who sent the envelope. She reveals that Sam and his wife Edith,believing themselves unable to have children,adopted Tom. The siblings manage to get Sam to say that Metzler gave them a baby but Mandy's mother,a former nurse at Greenlake,believes that a ward orderly named Ricky Tulse,not Metzler,was the truly sinister figure who encouraged vulnerable patients to have sex whilst he watched. Tom tracks down Tulse,dying of cancer,who admits,before killing himself,that he is Tom's father,having raped his mother. He claims that Metzler was aware that patients were being sexually abused and their babies sold - Metzler being the man who paid Sam the money. Tom now has his evidence to bring down Metzler,do what is best for Sam and start a new life back home with Mandy and Nancy,following his exile.