19:15Ambridge ExtraSeries 4 - OmnibusSeries 4, Episodes 13-14BBC Radio 4 Extra Duration: 30 minutes Sun 20th Jan 2013, 19:15 on BBC Radio 4 ExtraOur clue finders finally discover the true meaning of the clues and of their journey to Liverpool.GenresDramaSoapsBrandAmbridge ExtraSeriesAmbridge Extra: Series 4 - Omnibus Source: BBC Online