"The Office" (8:30 p.m., NBC): Dwight chases a bat around the office.

"The Office" (8:30 p.m., NBC): Dwight chases a bat around the office.
"Nixon: A Presidency Revealed" (8 p.m., History Channel): He was brilliant yet petty, vindictive but visionary. The reign of President Nixon saw the end of the Vietnam War, the dawn of progressive initiatives at home, and a promising new relationship with China. Yet Nixon, the only president forced to resign from office, was done in by paranoia, insecurity and illegal activities. This conflicted legacy is examined in "Nixon: A Presidency Revealed," a documentary premiering 8 p.m. Thursday on the History Channel.
"The O.C." (9 p.m., Fox): "The O.C." is undergoing a major shake-up as it closes in on its farewell episode. Tonight, the gang struggles to make sure everyone is OK after an earthquake hits Orange County. Seth is determined to do whatever it takes to get to Ryan and Taylor, despite Sandy's orders to stay put.
"How to Eat Your Watermelon in White Company [and Enjoy It]" (9 p.m., IFC): Melvin Van Peebles has blazed a trail through the jungle of the entertainment world. At 74, he is best known as an innovator in independent film with the release of "Sweet Sweetback's Baadasssss Song" in 1971, but a new documentary portrays him as a wildly versatile personality who also flew Air Force sorties over the Pacific, studied astronomy in Amsterdam, wrote novels in self-taught French, composed music using his own notation system, wrote stage plays and traded options on Wall Street.