Death and the Divas (S15E04)

A journalist writing a book about two sisters one a Hollywood superstar, the other a failed actress is murdered while watching a cult horror film starring one of them. As the Midsomer Langley Film Festival kicks off, more deaths follow, each imitating the sisters' horror films. The detectives dig up family secrets and bitter resentments as they race to prevent the killer's encore. (Prime Video)