Mad Grey Dawn

S2 E15: Gordon and Bullock investigate a trail of clues left in a museum robbery which unbeknownst to them were left by Nygma in a dangerous game of cat-and-mouse. Meanwhile Gordon's past comes back to haunt him when an anonymous person threatens to expose his hand in Galavan's murder. Also Penguin's visit to some old friends leads him to meet his father Elijah Van Dahl (guest star Paul Reubens) and Bruce practices his street smarts.