Question: "The Chump" is the 25th episode of the sixth season of this U.S. comedy series which debuted in what year? 

Context articles: Secret Santa (The Office)
The Office (U.S. TV series)
Niagara (The Office)
The Chump
Whistleblower (The Office)
The Lover (The Office)
The Delivery (The Office)
Mafia (The Office)
Shareholder Meeting
Double Date (The Office)

"Secret Santa" is the 13th episode of the sixth season of the U.S. comedy series "The Office" and the show's 113th episode overall.
 It was written by Mindy Kaling and directed by Randall Einhorn.
 The night the episode premiered, it was immediately followed by an episode of "30 Rock" with the same title.
The Office is an American television comedy series that aired on NBC from March 24, 2005, to May 16, 2013.
 It is an adaptation of the BBC series of the same name.
 "The Office" was adapted for American audiences by Greg Daniels, a veteran writer for "Saturday Night Live", "King of the Hill", and "The Simpsons".
 It is co-produced by Daniels' Deedle-Dee Productions, and Reveille Productions (later Shine America), in association with Universal Television.
 The original executive producers were Greg Daniels, Howard Klein, Ben Silverman, Ricky Gervais, and Stephen Merchant, with numerous others being promoted in later seasons.
"Niagara" is an hour-long episode of the sixth season of the U.S. comedy series "The Office".
 It is the 4th and 5th episodes in the season's episode count and the 104th and 105th episode of the series overall.
 The episode was written by executive producer Greg Daniels and Mindy Kaling, and was directed by Paul Feig.
 It originally aired on October 8, 2009 on NBC in the United States.
"The Chump" is the 25th episode of the sixth season of the U.S. comedy series "The Office" and the show's 125th episode overall.
 It aired on May 13, 2010 on NBC.
"Whistleblower" is the 26th episode and season finale of the sixth season of the U.S. comedy series: "The Office and" the show's 126th episode overall.
 It originally aired on May 20, 2010 on NBC.
"The Lover" is the 7th episode of the sixth season of the U.S. comedy series "The Office" and the show's 107th episode overall.
 It was written by Lee Eisenberg and Gene Stupnitsky and directed by Eisenberg.
 It originally aired on October 22, 2009 on NBC.
"The Delivery" is a two-part episode of the sixth season of the U.S. comedy series "The Office".
 Since it is an hour-long episode, it is considered to be the 17th and 18th episodes in the season's episode count.
 It is the 117th and 118th episode overall.
"Mafia" is the 6th episode of the sixth season of the U.S. comedy series "The Office" and the show's 106th episode overall.
 It originally aired on October 15, 2009 on NBC.
"Shareholder Meeting" is the 11th episode of the sixth season of the U.S. comedy series "The Office" and the show's 111th episode overall.
 It was written by Justin Spitzer and directed by Charles McDougall, and originally aired in the United States on NBC on November 19, 2009.
"Double Date" is the 9th episode of the sixth season of the U.S. comedy series "The Office" and the show's 109th episode overall.
 It was written by Charlie Grandy and directed by Seth Gordon.
 It originally aired on NBC on November 5, 2009.