20:00Herge's The Adventures of TintinSeries 2Episode 4: The Calculus Affair, part 2BBC Radio 4 Extra Duration: 30 minutes Thu 27th Mar 2008, 20:00 on BBC Radio 7Not only is Professor Calculus still missing, but his long-distance ultrasonic weapon has been stolen too. Stars Richard Pearce.GenresDramaAction & AdventureBrandHerge's The Adventures of TintinSeriesHerge's The Adventures of Tintin: Series 2 Source: BBC Online