Description: Castle and Beckett look into the murder of a young mathematician gunned down with a 200-year-old bullet, sparking some wild theories by Castle about a time-travelling killer. When their investigation uncovers a tricked-out DeLorean and a suspect in Victorian clothing, is it possible Castle's crazy idea has some validity? This winding tale twists through the towers of Wall Street and into the world of a secret steampunk society that embraces the romance and simplicity of the past, while coupling it with the hope and promise of the future. ///// Wall Street firm Berman Rose-employee Daniel Goldstein (25) was shot to death and stripped down to his luxury boxers in the park at night. Roland D'Andre hurts Esposito's neck during arrest after his fingerprint is found on Daniel's wallet, but the habitual violent robber denies having hurt Goldstein. The fatal flintlock-type round lead bullet was two centuries old, not fitting Roland's modern gun. Hundreds lost a lot in a novel investment fund devised by Daniel, including collector Ivan Podofski, who owns a fit antique type gun, yet not the murder weapon. Another investment victim committed suicide, his bitter son Troy Kenworth applied for a Berman Rose job. Goldstein's bloody clothes, found on loony vagrant 'Lord Henry', indicate he shot back, apparently which the matching bullet found near his corpse, as if they dueled in Owen Peterson's nightclub's fashion.