Two series of the show were produced, one in 1996 and one in 1997. The first, more serious series featured Richard Littlejohn as presenter, and a former KGB double agent Oleg Gordievsky as a co-host and analyst. The second series, which had its in-studio content lightened slightly, was presented by Ray Cokes, with commentary provided by Magenta Devine. Both series lasted for 8 weeks of 1 hour shows. The rules were slightly altered in the second series, allowing the Tracker to bribe the Runners on the final show of the week.