23:20Darts: World Championships - Highlights2011Day 6BBC Two Duration: 50 minutes Thu 6th Jan 2011, 23:20 on BBC Two EnglandRob Walker introduces highlights from the men's best-of-9 set quarter-finals.ContributorsPresenter:Rob WalkerCommentator:Tony GreenCommentator:David CroftCommentator:Vassos AlexanderGenresSportDartsBrandDarts: World Championships - HighlightsSeriesDarts: World Championships - Highlights: 2011 Source: BBC Online