Castle returns to the City of Angels in search of answers about his missing time. But things take a deadly turn when he's recruited by the legendary Greatest Detective Society to help solve a murder.

Cast: Billy Armstrong, Nathan Fillion, Courtney Ford, Darri Ingolfsson, Abhimanyu Katyal, Jon Knapp, Vince Nappo, Jason Manuel Olazabal, Doug Savant, Dylan John Seaton