Gameshow Marathon (stylized as Game$how Marathon) is an American television program which aired on CBS from May 31 to June 29, 2006. It is based on the United Kingdom series Ant & Dec's Gameshow Marathon which aired on ITV in 2005. It also aired in Canada on CTV. The show features contestants competing in some of television's most historically popular game shows, in a single-elimination format until an ultimate winner is found. Both the UK and US versions featured celebrity contestants.