05:00Herge's The Adventures of TintinSeries 2Episode 4: The Calculus Affair, part 2BBC Radio 4 Extra Duration: 30 minutes Mon 26th Dec 2011, 05:00 on BBC Radio 4 ExtraNot 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