Saturday afternoon, the Oprah Winfrey Network officially launches with "Oprah's Guide to OWN: The New Oprah Winfrey Network" (OWN at noon), with Oprah herself making the introduction.

"Great Performances" (WETA at 8) has "From Vienna: The New Year's Celebration 2011," hosted by Paula Zahn, and features conductor Franz Welser-Most and the Vienna Philharmonic in a special concert to celebrate 2011.

The second season of "V" (ABC) begins, a remake of the '80s sci-fi series about a "visitor" invasion on Earth. ABC airs the pilot at 8, followed by the Season 1 penultimate episode (at 9) and finale (at 10).

Sunday talk shows: "Platts Energy Week" (WUSA at 8 a.m.) discusses the top energy stories of the year; "BioCentury This Week" (WUSA at 8:30) talks biotechnology and cardiovascular disease; "Ideas in Action with Jim Glassman" (MPT at 8:30, 9:30 on WHUT) has the New America Foundation's Maya MacGuineas, the Cato Institute's Chris Edwards and the Center for American Progress's Michael Ettlinger; "Fox News Sunday" (Fox at 9) hosts Reps. Fred Upton (R-Mich.), Darrell Issa (R-Calif.), Sen.-elect Mike Lee (R-Utah) and Rep.-elect Allen West (R-Fla.); "Politics Program With Mark Plotkin" (TBD TV at 9) has D.C. Mayor-elect Vincent C. Gray; "White House Chronicle" (WETA at 9) has author Deborah Waroff and the National Institutes of Health's Paul Plotz; "State of the Union" (CNN at 9) hosts Issa.

"The Chris Matthews Show" (NBC at 10) hosts New York Magazine's John Heilemann, NBC's Kelly O'Donnell, the Atlantic's Andrew Sullivan and CNN's Gloria Borger; "This Week" (ABC at 10) features Council of Economic Advisers Chairman Austan Goolsbee, actor George Clooney, Enough Project co-founder John Prendergast, strategist Donna Brazile, National Journal's Major Garrett, and ABC's George Will and Amy Walter; "Newsmakers" (C-SPAN at 10) talks to Ann Wagner, candidate for chairman of the Republican National Committee; "Meet the Press" (NBC at 10:30) has Sen. Lindsey Graham (R-S.C.); "Face the Nation" (CBS at 10:30) talks to Reps. Issa, Michele Bachmann (R-Minn.), Debbie Wasserman Schultz (D-Fla.), Anthony Weiner (D-N.Y.) and Rep.-elect Mike Kelly (R-Pa.); "Washington Watch with Roland Martin" (TV One at 11) looks back at the show's highlights of the year, from senior presidential adviser Valerie Jarrett to RNC Chairman Michael Steele, among others; "This Week in Defense News" (WUSA at 11) has retired Army Gen. Hugh Shelton; "The McLaughlin Group" (WUSA at 11:30) features MSNBC's Pat Buchanan, Newsweek's Eleanor Clift, the Washington Times' Monica Crowley and U.S. News & World Report's Mort Zuckerman; "This Is America With Dennis Wholey" (WHUT at 6 p.m.) hosts a panel discussion about the United Nations' millennium development goals.