09:00Herge's The Adventures of TintinSeries 2Episode 3: The Calculus Affair, part 1BBC Radio 4 Extra Duration: 30 minutes Sun 18th Dec 2011, 09:00 on BBC Radio 4 ExtraWith two rival factions desperate for his latest invention, Professor Calculus goes missing in Geneva. Stars Richard Pearce.GenresDramaAction & AdventureBrandHerge's The Adventures of TintinSeriesHerge's The Adventures of Tintin: Series 2 Source: BBC Online