Vivat RexEpisode 5: TreasonBBC Radio 4 Extra Duration: 1 hourFirst broadcast: Fri 4th May 2012, 10:00 on BBC Radio 4 ExtraLatest broadcast: Sat 5th May 2012, 03:00 on BBC Radio 4 ExtraRichard Burton narrates the playwrights' chronicle of the English Crown. King Richard II risks rebellion. Stars Derek Jacobi.GenresDramaHistoricalSeriesVivat Rex Source: BBC Online