All the episodes featuring writers' games have "Death/Dead" in the title. again Richard Castle gets together with his literary friends to play poker and talk shop. Here Fillion plays Richard Castle, a bestselling mystery author whose since it hinges on some information kept from the audience until late in the game. A pair of famous mystery writers cameo as Fillion's poker buddies. For fans of the TV series -- and the authors -- these scenes were an extra The poker games will be back with Castle's April 11 episode, which airs at 10 p.m.