X-man (Hangul: X맨) was a popular South Korean game show which ran from November 8, 2003 to 2016 (also the second season to April 8, 2007, not popular one) on SBS. Its popularity peaked from 2004 to 2006. It was hosted by Yoo Jae-suk, Kang Ho-dong, Kim Je-dong, with Kim being successively replaced by Gong Hyung-jin, Park Kyung-lim, and Lee Hyuk-jae; only the first two were on the program since its inception.
Each season was divided into two episodes, airing in consecutive weeks. The first season was divided into six episodes, with three chances to find the X-man. The second and third season was divided into four episodes, with two chances. As of the fourth season, challengers only had one chance (two episodes) to find the X-man. The various celebrities were divided into two teams, with one led by Kang Ho-dong (Kang Team) and the second by the other main MC. Yoo Jae-suk served as the show's mediator and main MC. At the start of each episode, one celebrity would be chosen by the producer to be the X-man, whose main mission was to disrupt teamwork in his or her team and purposely throw challenges while keeping his or her identity a secret. Winning teams of each mission would be awarded ₩1 million. Actual amounts were undisclosed after earlier seasons.
After all the missions, the guests then voted on who they think is the X-man. The celebrity participant who was chosen was then digitally "fingerprinted" to see if the others chose correctly. If the others chose correctly, any money earned by the teams was donated to charity, under the names of the various guests. If they failed to find the X-man, the X-man was considered to have succeeded and the money donated to charity was given under the X-man's name.
The program first aired on November 8, 2003 as a "Genuine Psychological Reasoning Variety", Real Situation: Finding X-man (실제상황 X맨을 찾아라), a corner program of Real Situation Saturday. On October 10, 2004, the program was moved to Good Sunday and simply known as X-man. On November 5, 2006, the program became the sole program airing in Good Sunday and was officially known as X-man Good Sunday airing until April 8, 2007.
Yoo Jae-suk: Main Host, Season 1 Yoo Team Team Leader
Kang Ho-dong: Kang Team Team Leader
Kim Je-dong (November 8, 2003 - November 28, 2004): Kim Team Team Leader, Season 1 Main Host
Gong Hyung-jin (December 5, 2004 - May 1, 2005): Gong Team Team Leader
Park Kyung-lim (May 8, 2005 - April 30, 2006): Park Team Team Leader
Lee Hyuk-jae (May 7, 2006 - April 8, 2007): Lee Team Team Leader