Beatie Edney as Mary Cavendish (Agatha Christie's Poirot)

Mary Cavendish is the wife of John Cavendish, the stepson of Emily Inglethorp.

In The Mysterious Affair at Styles[edit | edit source]

Mary added a sedative to Emily’s coffee. When Emily died, she thought she was the murderer but later realized Emily was poisoned with strychnine.

In Curtain[edit | edit source]

In Curtain, it is revealed that John died before Mary and that the latter went to live in Devonshire.

Portrayals[edit | edit source]

In Agatha Christie's Poirot, Mary Cavendish was portrayed by Beatie Edney.

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