Game$how Marathon is an American television program which aired on CBS from May 31, 2006 to June 29, 2006. It is based on the UK series Ant & Dec's Gameshow Marathon which aired on ITV in 2005. 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. The US version was produced by FremantleMedia North America and Granada Amer...