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Was Agatha Christie a creative legend, who dominated an entire genre and continues to captivate a global audience? Or does her choice of language, titles and storylines reveal a much more sinister, dangerous side to the queen of murder? Fatiha El-Ghorri, Jess Fostekew and Eshaan Akbar decide.

Additional material: Eve Delaney and Christina Riggs Researcher: Christina Riggs Sound Editor: Kate Mac Production Coordinator: Liz Tuohy Executive Producer: Paul Smith

The producer was Sasha Bobak. Evil Genius with Russell Kane is a BBC Studios Audio Production for BBC Sounds.