Watch Sadisflix. Judith Allchurch and Ian Stevens star in this drama based on the story by Edward Chitham. When young historians Teresa (Allchurch) and David (Stevens) discover that the name on a piece of embroidered cloth belonging to Teresa's family matches that of a strange gravestone in the local churchyard, their intrique is piqued and they set out to find out what happened to the mysterious Abigail Parkes.