MONDAY, NOVEMBER 26

"90210" - (8:00-9:00 p.m. ET)

"99 Problems" (TV- 14, S) (HDTV)

NATALIE MORALES, AMBER STEVENS AND MUSICAL GUEST NE-YO GUEST STAR - When Adrianna (Jessica Lowndes) opens at the Hollywood Bowl for a headlining artist, Dixon (Tristan Wilds) decides to buy her a celebration gift. Suspecting he might propose, Silver (Jessica Stroup) convinces Ade to come clean about her affair with Taylor (Wes Brown). Annie (Shenae Grimes) confronts Riley (guest star Riley Smith) about standing her up for wrongly suspecting that Annie is uncomfortable with his disability. Naomi (AnnaLynne McCord) encourages Max (Josh Zuckerman) to hire an executive to replace Alec (guest-star Trai Byers), but she's uncomfortable when the perfect candidate-on-paper turns out to be a gorgeous girl, Bryce Albright (guest-star Amber Stevens). Liam (Matt Lanter) receives a threatening letter that suggests the anonymous source knows the truth about Vanessa's (guest-star Arielle Kebbel) disappearance, and he's relived when off-duty L.A.P.D. officer, Ashley Howard (guest-star Natalie Morales), becomes his bodyguard. Harry Sinclair directed the episode written by Terrence Coli (#507).