Olympic star Mo Farah says there's one thing in the world that's more difficult than winning the gold and that's winning on TV's The Cube. Mo recently became he first person to win the 250,000 pound top prize on the three-year-old game show. The British 5,000m world champ admitted to TV Biz: "Competing on The Cube was so nerve-racking. It is harder than running in a race, for sure." Farah's episode is set to air on Saturday.