The Time They Broke the Law - S1.E18

Spencer asks Sarah for all his money back. Sarah is being sued by a client, and all this situation lets her in deep debts. JB finds a last client for his business, but turns out he's a cop and arrests JB. The officer tells JB he had lived in Sarah's apartment 20 years ago. The officer starts asking questions about Sarah to her friends until he finds out her last name is indeed Merrin - like him. He interrogates Sarah and confesses knowing her mom. He tells her he's her father.