Anna Khaja

Jane and Lisbon decide to keep their new relationship a secret from their colleagues as they investigate the murder of an undercover agent.

Addison is shaken by the arrival of her father to Los Angeles and Cooper is arrested when he refuses to cooperate in a case involving a longtime patient.

The BAU travel to Maryland when a father's 911 call raises a red flag. As the facts of the case emerge, they wonder if he's a victim or a suspect.

When an affluent school teacher is found dead in an abandoned bookstore, the teachers and students at her school become suspects in the case. Meanwhile, Brennan’s publisher encourages her to join Twitter to help grow her fan base, and “squintern” Jessica Warren teaches Brennan some tricks to master the Twitter-verse, skills Brennan enthusiastically puts to use.

House's put-upon pal is contacted by an old friend and former patient who has been experiencing paralysis. Meanwhile, Cuddy continues her search for real estate.

One of the diverse recruits -- the best and the brightest -- who arrives at the FBI Quantico Base for training is suspected of masterminding a terrorist attack.