... but how? The murderer was obvious from almost the first scene but how? Like other reviewers, it was a different character arch for Sam in this storyline. For her to be sick - breathing problems, coughing and then spitting up blood - it all looked very serious. I did find it a tad unbelievable that this unspoken disease could be cured with antibiotics, but where's you faith? I loved the cast in this one: Kathryn Hunter (Sis Geraldine), Prunella Scales (Mother of the victim) and Philip Jackson (DI Mike Toner) were all top notch. I really love Philip Jackson from the Poirot series. It was so nice to see him in this. Good episode.