First broadcast 4th5th November 2021.br br Adam Dalgliesh is sent to a nursing school to investigate the death of Heather Pearce, a student poisoned during the demonstration.br br Helen Aluko - Christine Dakersbr Alice Nokes - Julia Pardoebr Eliot Salt - Madeleine Goodalebr Robin Kristoffy - Shirley Burtbr Alex Kristoffy - Maureen Burtbr Beccy Henderson - Heather Pearcebr Fenella Woolgar - Sister Mavis Gearingbr Amanda Root - Sister Brumfettbr Siobhán Cullen - Josephine Fallonbr Richard Dillane - Dr.