While Castle and Beckett team up with a hot-shot detective from Hong Kong to investigate a man murdered in the park, Beckett realizes that neither her Hong Kong colleague nor the victim may be quite who they seem.moreless
Martin is put on leave in the wake of a confrontation with the Colonel. Martin then begins to investigate his own past, discovering that an enigmatic smuggler in Houston may have the answers he needs. Martins assumes the legend of a Southern outlaw named Len Barlow to infiltrate the smuggling operation and get close to Kyle Dobson.moreless
Martin, Crystal and Troy Buchannan go undercover when a chemistry teacher and his family are kidnapped. The case takes on urgency when it's feared the kidnappers will use the teacher to manufacture a deadly gas.moreless
The NCIS team has to find out the cause of the helicopter crash that was found on shore and locate the missing pilot. Meawhile, Ziva issues a dare to Tony and McGee.
A human isolationist leader threatens to destroy Starfleet Command unless all aliens leave Earth immediately.