A man, who is a paranoid schizophrenic, has a delusional episode while on a full train and takes the passengers hostage, including Elle. Gideon and Hotchner race to save Elle and the other hostages.
The NCIS team are faced with an obsessed killer after a young woman's mummified remains are found dressed in a wedding gown in an abandoned compound.
Michael realizes that running the company isn't going to be as easy as he thought, especially since his father seems to be pulling some strings from inside the joint.
Frasier's anger and loose tongue land him in sexual harassment trouble with his hostile and arrogant new radio show partner, and Niles tries to treat patients from home.
Michael and the team have a day to find the next cardholder or they risk going back to prison; Mahone seeks revenge on Wyatt, who is attempting to get information on Sara's whereabouts; T-Bag finds a new identity and gets a job offer.