Danny chaperones Grace's winter formal but terrorists seize the venue and hold everyone hostage in order to kidnap a diplomat's son. Also, Danny and Grover are shocked to learn that Will is Grace's secret boyfriend.moreless
A high-stakes gambler's remains are discovered in an industrial shredder, but Booth's history of addiction comes into play when he and Brennan investigate the world of underground poker. Meanwhile, Hodgins invents a lab-related product; and Brennan and Booth get some exciting family news.moreless
Lisbon believes that the death of a geologist is the key to bringing down Tommy Volker.
An unusual meeting with a guy named Dennis shows Maura in a new light. Jane has mixed emotions when Casey returns.
As Barney gets ready for his wedding, a flashback to Punchy's wedding has Robin wrestling with whether or not to reveal she still has feelings for him and Marshall and Lily trying to keep their pregnancy secret.moreless
Callen and the rest of the NCIS team refuse to accept Hetty's sudden resignation without an explanation. They start their own investigation to find out why she's disappeared, hoping they can track her down.moreless