PetrellaSeries 1Episode 4: Outpacing the FiendBBC Radio 4 Extra Duration: 45 minutesFirst broadcast: Thu 13th Sep 2007, 10:15 on BBC Radio 7Latest broadcast: Sun 30th Dec 2012, 03:15 on BBC Radio 4 ExtraA ruthless murderer puts the inspector's marriage under strain and his family in mortal danger. Stars Philip Jackson.GenresDramaCrimeBrandPetrellaSeriesPetrella: Series 1 Source: BBC Online