Question: When did the ninth season of Will & Grace premiere?

Context paragraphs:
Will &amp; Grace (season 9): The ninth season of the American comedy series "Will & Grace" premiered on September 28, 2017.  It will consist of 16 episodes, and is the first of two planned reunion seasons following the series' initial final season in 2006.

Our First Day of School: "Our First Day of School" is the ninth season premiere of U.S. comedy-drama television show "Scrubs".  It first aired on ABC, on December 1, 2009.  Set around 18 months after the eighth season's finale, it is the first episode of "Scrubs" following the show's ninth season revamp, and marks the introduction of the show's new medical school setting while introducing several new main characters to the cast, with most of the previous main characters returning only to be featured in supportive or guest starring roles.  Zach Braff, who played central character J.D., agreed to come back for 6 of this season's 13 episodes, and narrates this episode alongside Kerry Bishé, who plays new character and narrator Lucy Bennett.  This episode marks the final appearance of The Janitor.

1980 Washington Diplomats season: The 1980 Washington Diplomats season was the club's ninth season of existence, their ninth season in the North American Soccer League and their ninth season in the then-top tier of American soccer.  The Dips played in the NASL's Eastern Division of the National Conference, and finished the season placed second in the division, behind the New York Cosmos.

11 Years Later: "11 Years Later" is the first episode of the ninth season of the American sitcom "Will & Grace".  The episode first aired on September 28, 2017, on NBC.

Grey's Anatomy (season 9): The ninth season of the American television medical drama "Grey's Anatomy" began airing in the United States on the American Broadcasting Company (ABC) on September 27, 2012, with the season premiere "Going, Going, Gone" and consists of 24 episodes with the finale "Perfect Storm" airing on May 16, 2013.  The season was produced by ABC Studios, in association with ShondaLand Production Company and The Mark Gordon Company; the showrunner being Shonda Rhimes.  The season was officially released on DVD as a six-disc boxset under the title of Grey's Anatomy: The Complete Ninth Season - Everything Changes on August 27, 2013 by Buena Vista Home Entertainment.

Big Brother 9 (U.S.): Big Brother 9, also known as Big Brother: 'Til Death Do You Part, was the ninth season of the American reality television series "Big Brother".  It is based upon the Netherlands series of the same name, which gained notoriety in 1999 and 2000.  "Big Brother 9" is the first season of the series to air in the Winter time period, due to a writer's strike.  The series premiered on CBS on February 12, 2008 and lasted eleven weeks until the live finale on April 27, 2008.  The ninth season saw a decrease in ratings when compared to past editions of the series.  The season premiered to a total of 7.33 million viewers, the lowest premiere numbers for any season at the time.  Overall, the series averaged 6.56 million viewers, making it the lowest rated season of the series at the time.  "Big Brother 9" was the first season to cast a total of 16 HouseGuests, in which it became a permanent change to the format in season 14 and subsequent seasons.  The series ended after 81 days, in which HouseGuest Adam Jasinski was crowned the winner, and Ryan Quicksall the runner-up.

People Who Love Peepholes: "People Who Love Peepholes" is the 179th episode and second episode of the ninth season of the American sitcom "Two and a Half Men."  It is also the second part of the two part premiere of the ninth season.

NCIS: Los Angeles: NCIS: Los Angeles is an American action television series combining elements of the military drama and police procedural genres, which premiered on CBS on September 22, 2009, and stars Chris O'Donnell and LL Cool J.  The series follows the exploits of the Los Angeles-based Office of Special Projects (OSP), an elite division of the Naval Criminal Investigative Service that specializes in undercover assignments.  "NCIS: Los Angeles" is the first spin-off of the successful series "NCIS".  On March 23, 2017, CBS renewed the series for a ninth season which will premiere on October 1, 2017.  Nia Long joined the cast as Shay Mosley for the ninth season after Miguel Ferrer's death.

Nuestra Belleza Latina 2015: Nuestra Belleza Latina 2015 (also known as NBL 2015) is the ninth season of "Nuestra Belleza Latina" and the ninth season to be aired on Univision.  The season premiere was on Sunday January 18, 2015, the earliest premiere of all nine seasons.  The season finale was on Sunday April 12, 2015, the earliest finale of all nine seasons.

American Ninja Warrior (season 9): The ninth season of the reality competition series "American Ninja Warrior" premiered on June 12, 2017 on NBC.  Hosts Matt Iseman and Akbar Gbaja-Biamila returned for their respective eighth and fifth seasons, alongside sideline reporter Kristine Leahy who returned for her third season.  In addition prior to the ninth season premiere, NBC aired a special "ANW" Celebrity, Red Nose Day edition featuring ten celebrities coached by ten elite ninjas on May 25 before airing USA vs. The World III on June 4.

Supporting paragraphs: 11 Years Later Will &amp; Grace (season 9)
Answer: September 28, 2017, on NBC