Michelle Wolff

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.

Gibbs leads the investigation into a murder victim found in a taxi headed to NCIS headquarters; Jenny discovers a secret about her past.

Veronica faces a difficult choice as she tries to discover who murdered her best friend; Jake asks Duncan if he's sure he wants to know what happened the night Lily died; Keith awaits the results of a paternity test.

Sean and Julia hire a nanny (PETER DINKLAGE). Sean's desires are revealed. Liz witnesses an event that changes her relationship with Michelle. MARIO LOPEZ guest stars.