Father Brown - Season 3 Episode 8

Marooned in the country Father Brown, Lady Felicia and Mrs McCarthy come across the Hotel Cuba where the exotic Madame Chania is organizing a weekend of hedonism for three wealthy playboys. Two prostitutes are expected but one is found dead and soon the guests are being murdered. Madame Chania would seem to be responsible but Father Brown uncovers a case of hidden identity and exposes a murderer who kills purely for the pleasure of it.