We left illicit lovers Dr Yvonne Carmichael and Mark Costley at George Selway’s house. At the end of episode one, Selway had brutally attacked Yvonne and most of episode two dealt with the fall-out from that horrific event. By this time we were desperate to know what Costley had done to Selway after he entered the house, especially a final montage sequence suggested something very bad had happened. It didn’t take long to find out.
NB: Spoilers inside