Peter Ustinov portrays the iconic detective Hercule Poirot, known for his keen investigative skills and distinctive mustache.
James Mason plays Odell Gardener, a character involved in the mysterious events unfolding at the resort.
Sylvia Miles takes on the role of Myra Gardener, a character entangled in the web of secrets at the heart of the story.
Roddy McDowall portrays Rex Brewster, a key figure in the unfolding drama at the seaside hotel.
Maggie Smith brings to life Daphne Castle, a character with her own motives and secrets in the story.
Jane Birkin plays Christine Redfern, a character whose actions play a crucial role in the events that transpire.
Nicholas Clay takes on the role of Patrick Redfern, a character whose actions are central to the unfolding mystery.
Diana Rigg portrays Arlena Stuart Marshall, a character whose presence casts a shadow over the other characters.
Denis Quilley plays Kenneth Marshall, a character connected to the intricate web of relationships in the story.
Colin Blakely portrays Horace Blatt, a character whose presence adds another layer of complexity to the unfolding mystery.
Emily Hone plays Linda Marshall, a character whose actions have a significant impact on the events that transpire.
Paul Antrim appears as the Police Inspector, a character tasked with unraveling the mystery and apprehending the culprit.
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