Nick McCallum

Danny and Mac investigate after a briefcase belonging to Luke Sutton is found left in the NYMEX with a bloody note inside. Their investigation into Sutton's activities lead them to Nick Lawson, whom Sutton had been investigating for illegal trades, but who swears he had nothing to do with his disappearance. Stella and Flack investigate the death of Trina Rolston, a young pregnant women who fell to her death from the roof of a church. With Hawkes help, Stella realises that the body was thrown off the roof to mask the true cause of death. The detectives soon realise that their two cases are connected.

When a pool shark is murdered by an unseen force, Castle and Becket uncover evidence that the killer may have paranormal powers. Meanwhile, Castle and Beckett attempt to get their lives back to normal following his disappearance.

Under Cuddy's pressure to choose his team, House gives the candidates a case of a former punk rock star who is a drug user; whoever diagnoses the patient is going to have a future as a member of House's team.

A murder weapon is found during the city's gun recovery program, prompting detectives to take another look at the accidental 1987 drive-by shooting of a little girl.