Susan interviews a noted arsonist imprisoned in France,Jacques Dutronc,on the psychology of arson whilst both Andy and another fire-raiser,former asylum inmate Miles Van Der Twemp are cleared as having no links to both murders. A new suspect enters the frame, Susan Etchells,who was in the asylum under her mother's name,Susan Winters - the latest victim being a teacher who sacked a woman by that name. Creegan finds that he has to go back to school,literally,to discover the disturbed woman behind the attacks and risk his life to save another victim.
—don @ minifie-1