IT'S NIKITA VS PERCY IN THIS EXPLOSIVE SEASON FINALE — Nikita and Michael invade Division in an attempt to capture Percy. Alex and Sean get caught in a deadly gunfire battle with the U.S. Marines and Ryan must convince the President of the United States not to destroy Division until he is sure Nikita and Michael are safely out of the building, but the President is eager to end Percy's reign. Meanwhile, Birkhoff asks Sonya (guest star Lyndie Greenwood) for help, and Nikita corners Percy in his office, but he pulls out one final trick that may cost her the battle. Eagle Egillson directed the episode written by Carlos Coto.

SAM AND DEAN STORM SUCROCORP TO TAKE DOWN DICK ROMAN — Dean and Sam prepare for battle with Dick Roman (guest star James Patrick Stuart). Dick's in the final phase of his plan and the Winchesters must team up with Castiel (guest star Misha Collins), Bobby (guest star Jim Beaver), Meg (guest star Rachel Miner) and Kevin (guest star Osric Chau), the prophet, to stop him. However, Dick is one of the smartest enemies they've ever faced so it's a mind game to see who can keep the upper hand. Robert Singer directed the episode written by Sera Gamble.

As Haley (Bethany Joy Galeotti) prepares to emcee the annual Tree Hill Burning Boat Festival, Brooke (Sophia Bush) uses the opportunity to process her father's betrayal, while Julian (Austin Nichols) tries to breathe new life into a past idea. Mouth (Lee Norris) and Millie (Lisa Goldstein) make a change to their morning show, and Clay (Robert Buckley) and Quinn (Shantel VanSanten) get ready for Logan's (guest star Pierce Gagnon) first night at the beach house.

TWO-HOUR SERIES FINALE EVENT - In the final chapter of One Tree Hill, the tenth anniversary of Tric brings old faces and new possibilities for the Tree Hill family.

SERIES STAR TIM MATHESON DIRECTS THE SEASON FINALE / GEORGE AND LEMON PREPARE FOR THE BIG DAY — With an impending storm about to hit Bluebell, George (Scott Porter) and Lemon (Jaime King) prepare for their wedding day. Meanwhile, taking shelter from the storm, Zoe (Rachel Bilson) finds herself stranded in a barn with Wade (Wilson Bethel). Cress Williams and Tim Matheson also star. Tim Matheson directed the episode written by executive producer Leila Gerstein.