MONDAY, SEPTEMBER 6

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

"Confessions" (TV-14, L) (HDTV)

RYAN O'NEAL GUEST STARS IN THE EXPLOSIVE SEASON FINALE - Annie (Shenae Grimes) and Liam (Matt Lanter) test out the waters with his new boat, where they share their darkest secrets. Little do they know that someone is nearby and decides to share an explosive flame of gasoline with Liam's boat. Liam finally tells Naomi (AnnaLynne McCord) their relationship isn't working, leaving her more alone than ever. After a late-night dance, Naomi turns to someone for help, but he ultimately helps himself to her. Adrianna (Jessica Lowndes) is offered the opportunity of a lifetime but is torn about the direction to take after Navid (Michael Steger) confesses his true feelings for her. Teddy (Trevor Donovan) discovers that Spence (guest star Ryan O'Neal) tried to bribe Silver (Jessica Stroup) and takes it upon himself to seek revenge in a most confrontational way. Ryan (Ryan Eggold) is delivered some mind-blowing news about his past with Jen (Sara Foster) when a mysterious package arrives on his doorstep, causing him to head down a disasterous path. Dixon (Tristan Wilds) and Ivy's (Gillian Zinser) summer vacation plans in Australia comes to a screeching halt when he confesses to kissing Silver. Harry (Rob Estes) and Debbie (Lori Loughlin) face a major hurdle in their marriage when she learns the truth that he has been hiding in order to protect Dixon. Executive producer Rebecca Sinclair wrote and directed the episode (#222). Contact: Jeff Tobler, (818) 977-3719