Three Coins in a Fuchsbau

S1, E13: A failed jewelry store robbery results in a murder that finds Nick (David Giuntoli) and Hank (Russell Hornsby) immersed in a hunt for rare coins. Nick soon learns that these coins have an unsettling effect on whoever possesses them, as Hank and Captain Renard (Sasha Roiz) begin to exhibit unusual behavior. Meanwhile, a mysterious old friend of Aunt Marie’s (guest star Titus Welliver, "Lost") comes to Nick with information about his family and what led to his parents' death. Bitsie Tulloch, Silas Weir Mitchell and Reggie Lee also star.