Batman (1966)

S2E15 The Devil's Fingers

Chandell, the celebrated pianist, arrives in Gotham City for a highly anticipated concert. However, he is secretly coerced into a life of crime by his identical twin, Harry, who siphons off the illicit profits. Desperate to free himself from Harry's grip, Chandell plans to steal money from the Wayne family fortune. With Batman and Robin away, Chandell believes the heist will be simple. Unbeknownst to him, Batman is listening to his performance remotely. Upon noticing an unusual chord, he calls Robin back to Wayne Manor for a closer look into Chandell's true intentions.