Frances Kidder - Wicked Stepmother

S1, E4: In August 1867, Frances Kidder took her 11-year-old stepdaughter Louisa for a walk across lonely wetlands. The child was later found dead. Lucy Worsley and historian Professor Rosalind Crone visit the scene of the crime in Kent to find out more and are joined by Dr Gwen Adshead, a renowned psychiatrist and psychotherapist at the notorious Broadmoor Hospital to discuss the case.