Cell 99 (S01E05)

The final entry in Henry Scarlet’s casebook takes Eliza to an abandoned prison on the outskirts of London. She and Duke investigate what seems like an empty building but they soon discover that it is the hideout for a criminal gang. This is a bottle episode, all filmed on location in a real Victorian prison. Duke and Eliza will realize that Henry Scarlet was murdered by this gang. (A&E Television Networks)