Guest Stars Saskia Ashdown as Sam DeCosta Charlene Boyd as Siobhan Kelly Graeme Rooney as Murdo Sterling Kim Allan as Heidi Greenshields Lewis Howden as Rab Sterling Paul McCole as Mitch McAskill Dyfan Dwyfor as Neil Kelly Moyo Akandé as Mel Hetherington Sally Reid as Fiona Campbell Sahil Arora as Nathan Anderson Jack Hunter as Sandy Campbell Martin Bell as Stuart Straney