13:15Snooker: World Championship2017Episode 157: Day 15, Semi-Finals, Afternoon Session - Pt 1BBC Two Duration: 3 hours Sat 29th Apr 2017, 13:15 on BBC One YorkshireSemi-final action continues in Sheffield as the penultimate session is played in the bottom half of the draw. Live coverage is introduced by Hazel Irvine.GenresSportSnookerBrandSnooker: World ChampionshipSeriesSnooker: World Championship: 2017 Source: BBC Online