Jeremy Ray Valdez

The team finds themselves in a race against time when a terrorist group threatens to detonate a "dirty bomb" in the D.C. area. Also available on VUDU

Brenda's squad investigates the murder of a former gang banger, but evidence indicates the victim may not have been the target. The case leads Brenda on a return trip to the doorstep of Father Jack (guest star MARK ROLSTON - 'Cold Case,' 'The Shield') and the Crenshaw Community Center, where an upset neighborhood is convinced the LAPD doesn't care about stifling crime in the area. It's up to Brenda to prove otherwise. Also available on iTunes

In the season finale, after learning the identity of the person who is responsible for the bus crash, Veronica hurries to warn others but ends up putting herself in an extremely perilous situation. Meanwhile, Keith enlists Veronica's help in his ongoing investigation of Woody (recurring guest star STEVE GUTTENBERG), asking her to go undercover and get some vital information from Woody's lawyer. Later, when graduation day finally comes around, Neptune seniors celebrate with a huge party at the Neptune Grand. Recurring guest star HARRY HAMLIN appears as Aaron Echolls; recurring guest star TINA MAJORINO appears as Mac; and recurring guest star CHARISMA CARPENTER appears as Kendall. Also available on iTunes and VUDU

A restless Veronica is plagued by dreams in which the students killed in the bus crash confront her. Meanwhile, when Logan and Weevil work on a physics project together, neither is enthusiastic until they discover that their success might help Veronica receive a scholarship. Later, when a large number of students are diagnosed with a medical ailment that gives them the right to postpone school tests and projects, the concerned principal hires Keith to investigate the validity of the disorder. Also available on iTunes and VUDU