Check out memorable moments and guests from NBC's "30 Rock" in honor of the show's series finale airing Jan. 31.
Alec Baldwin shows the Golden Globe statue he won for his role on the NBC series "30 Rock" as he arrives for the NBC, Universal Pictures and Focus Features party following the 64th Golden Globe Awards in Beverly Hills, Calif. (Jan. 15, 2007)
Former vice president Al Gore made two cameo appearances as himself, in 2007 and 2009.
From left, Tracy Morgan, Alec Baldwin, Jack McBrayer and Judah Friedlander from the cast of "30 Rock" joke around backstage after "30 Rock" won the award for outstanding comedy series at the 59th Primetime Emmy Awards at the Shrine Auditorium in Los Angeles. (Sept. 16, 2007)
Edie Falco appeared as Celeste "C.C." Cunningham, a Democratic congresswoman who inexplicably becomes romantically involved with Jack, from 2007 to 2008.
Matthew Broderick, left, appeared as Cooter Burger, a government employee and lobbyist whom Jack enlists to help him get fired from his temporary job as Homeland Security director for crisis and weather management, in 2008 and 2012.
Playing herself, Oprah Winfrey sat next to Liz on an airplane on a 2008 episode. Liz later realizes that it wasn't the talk-show host at all, but merely a hallucination caused by medication she had taken.
Megan Mullally as Bev, Liz's adoption-agency caseworker, appeared in episodes in 2008 and 2013.
Jon Hamm played Dr. Drew Baird, Liz's neighbor and (brief) love interest, from 2009 to 2010.
Elizabeth Banks played Avery Jessup, an ambitious financial news anchor who was briefly married to Jack and was the mother of his child, from 2010 to 2012.
Cast members from the NBC's "30 Rock," including front row from left, Jack McBrayer, Tina Fey, Alec Baldwin and Jane Krakowski celebrate the 100th episode taping at Silver Cup Studios in New York. (March 10, 2011)