In discussing the possibility that an escaped murderer might be executed if they were to be returned to Tonga, Blakemore states that "they haven't hung anybody in Tonga for ten years, maybe more". The statement is correct - no executions had been performed in Tonga since 1982, eighteen years before the episode's setting - but the proper past participle in English for hanging specifically as a method of execution is "hanged", not "hung".