Thomas Kopache

A young mathematician is shot with a 200-year-old bullet, inspiring wild theories by Castle about a time-traveling murderer.

With Finch missing – kidnapped by his hacker nemesis, Root (guest star AMY ACKER) in last season's finale cliffhanger – Reese enlists Detectives Carter and Fusco to join the search for his friend on the second season premiere. But can they continue without him? Meanwhile, The Machine never sleeps and issues a new number to Reese. KEN LEUNG (Lost) guest stars as the latest Person of Interest.

Rory begins to serve her community service working with a road crew; Lorelai and Luke debate fixing up the house or buying another.

During the reinvestigation of a ballplayer found bludgeoned to death in 1945, Lilly and Jeffries run out of leads and must retrace their steps if they hope to collar the killer.

Lori Colson has to defend a man accused of murdering a police officer when the firm must take a criminal case unexpectedly.

Mulder and Scully investigate a man whose wounds reportedly resulted from suicide attempts but seem to suggest something sinister.