Season 1
The first season of Two and a Half Men, an American television series created by Chuck Lorre and Lee Aronsohn, that aired its pilot episode on September 22, 2003, at 9:30 p.m., ET/PT, on CBS, a U.S. broadcast television network. The pilot received great reviews and an Artios Award nomination for Best Casting for TV, Comedy Pilot (Nikki Valko, Ken Miller). In the week of October 1, 2003, the series was ranked 7th highest in the top ten shows of the week according to Nielsen Research, with an average 12.1/18 rating. Thanks to this, the series was able to air another 23 episodes, and was renewed for a second season in 2004. The DVD set was released on Region 2 on September 12, 2005, and on Region 1 on September 11, 2007. Its bonus material included: a blooper, outtakes, a backstage tour with Angus T. Jones and a behind-the-scenes special, with the cast and crew of Two and a Half Men.
Season 2
The second season of Two and a Half Men originally aired between September 2004 and May 2005. The season consisted of 24 episodes. The DVD was released on January 8, 2008.
Season 3
The third season of Two and a Half Men originally aired between September 2005 and May 2006.
Season 4
The fourth season of Two and a Half Men originally aired on on CBS from September 18, 2006, to May 14, 2007.
Season 5
The fifth season of Two and a Half Men originally aired on CBS from September 24, 2007, to May 19, 2008. A total of only 19 episodes were aired due to the 2007–2008 Writers Guild of America strike. Unlike the previous seasons, the Season 5 DVD came without a gag reel. This was the shortest season in the history of the show until the seventh and eighth seasons ended after 22 and 16 episodes, respectively, due to the firing of Charlie Sheen.
Season 6
The sixth season of Two and a Half Men began September 22, 2008 and concluded on May 18, 2009.
Season 7
The seventh season of Two and a Half Men premiered in the United States on September 21, 2009, and in Australia on September 28, 2009.
Season 8
The eighth season of Two and a Half Men premiered on September 20, 2010 in the United States & Canada; October 18, 2010 in Australia and on February 7, 2011 in the UK. The season finished on February 14, 2011 with only 16 episodes aired, making season eight the shortest season to date and the last season of the show with its main star Charlie Sheen. Although being advertised with a Gag Reel, the Season 8 DVD did not include one, making it and Season 5 the only DVDs not to have them. As of December 22, 2010, Two and a Half Men is ranked at number 10 on the 10 most watched TV programs of 2010.
Season 9
The ninth season of Two and a Half Men premiered on CBS on September 19, 2011, with Ashton Kutcher joining the cast as Walden Schmidt. This season is the first without the show's star Charlie Sheen, as well as the first to feature a retooled plot, marking a major change in the series by focusing on Alan moving on with his life after the death of Charlie with help from his new best friend and housemate, Walden, a dot-com billionaire who is in the process of being divorced by his wife. The trio bond and form a surrogate family unit. This was the last season to air on Mondays.