Zach Galifianakis appears on NBC News' "Today" show in New York City, May 9, 2013.
ASSOCIATED PRESS / ASSOCIATED PRESS
Ths March 9, 2013 photo released by NBC shows Bill Hader in character as Stefon on "Saturday Night Live," in New York. Hader is leaving "Saturday Night Live" after an eight-year run. His spokesman confirms the 34-year-old comedian will depart "SNL" after this weekend's season finale. (AP Photo/NBC, Dana Edelson)
Fox, right, returns to NBC
NBC NewsWire / NBCU Photo Bank via Getty Images
TODAY -- Pictured: Marissa Mayer appears on NBC News' "Today" show -- (Photo by: Peter Kramer/NBC/NBC NewsWire)
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Marissa Mayer appears on NBC
Mike Segar / REUTERS
An NBC sign on the General Electric building in New York City.
NBC, Paul Drinkwater / AP
This image released by NBC shows Ben Affleck with his award for best director for "Argo" during the 70th Annual Golden Globe Awards at the Beverly Hilton Hotel on Jan. 13, 2013, in Beverly Hills, Calif.
NBC, Paul Drinkwater / AP
This image released by NBC shows Claire Danes with her award for best actress in a TV drama series for her role in "Homeland" during the 70th Annual Golden Globe Awards at the Beverly Hilton Hotel on Jan. 13, 2013, in Beverly Hills, Calif.
Brendan McDermid / Reuters
Korean rapper-singer Psy performs on NBC's "Today" show in New York September 14, 2012.
Charles Sykes / NBC / NBCU Photo Bank via Getty Images
PSY appears on NBC's "Today" show
Peter Kramer / NBC
Rosie O'Donnell appears on NBC News' "Today" show in New York City, April 26, 2012.
Not originally published in LIFE. Joe Frazier tests out a band member’s trumpet on the set of NBC’s “Kraft Music Hall” variety show in 1971.
Not originally published in LIFE. Joe Frazier tests out a band member's trumpet on the set of NBC's "Kraft Music Hall" variety show in 1971.
David Mcnew / Getty
An NBC sign stands at the NBC studios in Burbank, California.
CHRIS HASTON / AP
In this image released by NBC, opera singer Neal E. Boyd, an insurance salesman from Sikeston, Mo., performs on an episode of the NBC talent competition, "America's Got Talent," on Sept. 24, 2008 in Studio City, Calif.
NBC News / File / AP
This undated file photo circulated by law enforcement and provided by NBC News, shows Adam Lanza.
In this image from Facebook, Richard Engel, chief foreign correspondent for NBC News, right, is pictured during a recent reporting trip to Syria with Ghazi Balkiz, left, and photographer John Kooistra, center.
Tina Fey and James Marsden (Ali Goldstein/NBC)
Tyler Golden / NBC / NBCU Photo Bank
Elle Macpherson presents on the finale of NBC's Fashion Star.
Bob Mahoney / NBC
Tracy Spiridakos as Charlie Matheson in NBC's Revolution
Andreas Feininger—TIME & LIFE Pictures/Getty Images
Eva Marie Saint opens a prop door during a TV shoot at NBC studios in 1947. The Newark, N.J.-born actress started her career as an NBC page.
Mitchell Haaseth / NBC
Outsourced: The new NBC comedy, set in an Indian call center, stakes out new territory with a largely Asian cast — though it focuses a lot on the culture clashes experienced by the lead character, a white guy from the Midwest
Hulton-Deutsch Collection / Corbis
The National Broadcasting Corporation (NBC) studios in Los Angeles in 1951
Brian Bowen Smith / NBC
The cast of NBC's "ER", Parminder Nagra as Neela Rasgotra, left, John Stamos as Tony Gates, Mekhi Phifer as Dr. Gregory Pratt, Maura Tierney as Abby Lockhart, Linda Cardellini as Samantha Taggart, Scott Grimes as Dr. Archie Morris.
Alex Wong / Getty for Meet the Press
NBC News Political Director Chuck Todd.
Jason DeCrow / AP
NBC News correspondent Tom Brokaw.
Ethan Miller / Getty for Comedy Central
NBC News anchor Brian Williams (L) is interviewed by host Jon Stewart of Comedy Central's "The Daily Show with Jon Stewart" at the McNally Smith College of Music September 2, 2008 in St. Paul, Minnesota.
Margaret Norton / NBC Universal / Reuters
Jay Leno interviews fellow NBC talk show host Conan O'Brien during a taping of "The Tonight Show with Jay Leno", March 27, 2008.
Alex Wong / Getty
Tim Russert of NBC News died Friday, June 13, 2008, in Washington, D.C.
ILLUSTRATION FOR TIME BY C.F. PAYNE
NBC's Brian Williams
Memo to NBC: Show more badminton!
Jed Jacobsohn / The New York Times via Redux
Jim Bell, the seven-year executive producer of "Today," in the NBC control room in the International Broadcast Center in London. Bell orchestrates NBC's coverage of the Olympics, which has garnered big ratings for the network.
Phil McCarten / Reuters
Ben Silverman, former co-chairman of NBC Entertainment
Former President Bill Clinton on NBC's "Today Show"
Trae Patton / NBC / Everett
Selma Blair and Molly Shannon in NBC's Kath and Kim
Brendan Smialowski / Meet The Press / Reuters
Former Secretary of State Colin Powell speaks during a taping of NBC's "Meet the Press"on Oct. 19
Evan Agostini / AP
Actor Jimmy Fallon, whose debut as the new host of NBC's Late Night will come online, not on television.
Carlos Barria / Reuters
Tim Russert, of NBC News died Friday, June 13, 2008, in Washington, D.C.
Brendan Smialowski / Getty
Tim Russert, of NBC News died, Friday, June 13, 2008, in Washington, D.C.
NBC / AP
The comedian in a 1975 promotional photo for NBC's "Saturday Night Live"
Spencer Platt / Getty
Writer Steven Katz passes out flyers in front of NBC studios January 7, 2008 in New York City.
JUSTIN LUBIN / NBC
Steve Carell as Michalel Scott in NBC series "The Office"
Arnold Schwarzenegger greets supporters outside NBC studios in Burbank
TED THAI FOR TIME
ANCHORED: Brokaw at NBC News
HENNY RAY ABRAMS/AFP
The cast from the new NBC fall show 'Hidden Hills' arrives at the upfronts
Pedestrians and press gather outside the NBC studios in New York
Giuliani speaks at a news conference regarding an NBC News employee in NYC
The stars of NBC's Olympic broadcast: Women's beach volleyball
FREAKS AND GEEKS (NBC)
AP / Richard Drew
Bonnie Franklin, of the 1970's sitcom "One Day at a Time, " appears with the reunited cast on the the NBC "Today" television program in New York Feb. 26, 2008.
Alex Wong / Getty
Florida Governor Charlie Crist speaks during a taping of "Meet the Press" at the NBC studios in Washington, DC.
AP Photo / NBC, Paul Drinkwate
Nadya Suleman, left, speaking with Ann Curry for an upcoming intervew on NBC's "Today" Show
Tom Brokaw is shown on his first day as host of the NBC "Today" show in New York City, August 30, 1970