The Borgias (2011)

S6E8 The Case of the Stand-In Sister

Title: The Mystery of the Substitute Sister Plot: Two siblings, at different intervals, assert that a single young girl is their child. One is a wealthy tuna boat owner, while the other is involved in organized crime. When banker Franz Moray uncovers that $100,000 meant for the girl has been improperly managed, chaos ensues. Following Moray's shocking murder, Perry takes charge of the investigation and delves into a long-buried family mystery.