KO One

KO One (traditional Chinese: 終極一班; simplified Chinese: 终极一班; pinyin: zhōng jí yī bān; literally "The Extreme Class") is a 2005 Taiwanese drama starring Jiro Wang, Calvin Chen, Aaron Yan and Danson Tang. It was produced by Comic International Productions (可米國際影視事業股份有限公司) and was first broadcast in Taiwan on cable TV Gala Television (GTV) Variety Show/CH 28 (八大綜合台) on 26 November 2005 to 27 May 2006.

Before this drama was aired there was not much interests in it, due to the storyline and unfamiliar cast. Despite the new encounters, the ratings of KO One exceeded expectations. Although the ratings were not high, it brought fame to three of the four leads (Jiro Wang, Calvin Chen, Aaron Yan), who are part of the then newly formed Taiwanese boy band called Fahrenheit. This drama also brought fame to the Taiwanese artist, Tank who wrote and sang the opening and ending theme songs. The KO One original soundtrack was the best selling soundtrack of 2006, selling more than 60,000 copies in Taiwan within the first month of release.

The sequel The X-Family was broadcast from 8 August 2007 to 23 October 2007 and threequel, K.O.3an Guo was broadcast from 28 February 2009 to 27 February 2010, on cable TV Gala Television (GTV) Variety Show/CH 28 (八大綜合台).

On december 26, 2012, a new series is released on GTV, named KO One Return, which continues the story of KO One and serves as a midquel of K.O.3an Guo.