Shark (2006)

S1E21 Strange Bedfellows

The reappearance of an 11-year-old boy, who vanished four years earlier, presents Stark with a perplexing case. Throughout those years, the boy had been living with his abductor, believing himself to be the man's son. Now, Sebastian faces the challenge of refuting the kidnapper's assertion that he was safeguarding the boy from abusive parents.