In Infernal Serpent, Morse and Lewis have to tackle a particularly unsavoury case involving child abuse. Their enquiries into the murder of an eminent environmentalist, killed minutes before he was due to give a controversial lecture, unearth skeletons in the cupboard of a respectable academic family. Cheryl Campbell, whose television credits include Pennies From Heaven, Malice Aforethought and Testament of Youth, plays an investigative journalist who has some shocking and disturbing childhood secrets. Geoffrey Palmer, Barbara Leigh-Hunt and Irene Richard also star.