Suggestions by @ostep925

Jaye Jacobs

as Dr Jane Pinchbeck in And Then There Were None (story private)

Score: +1

Nicholas Galitzine

as Tyrian Kirke in And Then There Were None (story private)

Score: +1

Lex Shrapnel

as William Blore in And Then There Were None (story private)

Score: +1

Terence Stamp

as Judge Swettenham in And Then There Were None (story private)

Score: +1

Daniel Sharman

as Ludo Rogers in And Then There Were None (story private)

Score: +1

Stephanie Leonidas

as Maria Rogers in And Then There Were None (story private)

Score: +1

Marisa Berenson

as Romy Christophe in And Then There Were None (story private)

Score: +1

David Yelland

as General Maxwell in And Then There Were None (story private)

Score: +1

Paul Mescal

as Noah Lombard in And Then There Were None (story private)

Score: +1

Synnøve Karlsen

as Candida Jones in And Then There Were None (story private)

Score: +1

Iddo Goldberg

as William Blore in Ten Little Soldier Boys (2016)(story private)

Score: +1

Phoebe Dynevor

as Ginger Corrigan in The Pale Horse (story private)

Score: +1

Olivia Colman

as Ariadne Oliver in The Pale Horse (story private)

Score: +1

Eleanor Bron

as Thyrza Grey in The Pale Horse (story private)

Score: +1

Jason Watkins

as Zachariah Osborne in The Pale Horse (story private)

Score: +1

David Bradley

as Lord Venables in The Pale Horse (story private)

Score: +1

Regé-Jean Page

as Mark Easterbrook in The Pale Horse (story private)

Score: +1

Diana Rigg

as Louise Leidner in Murder in Mesopotamia (1988)(story private)

Score: +1

Christopher Plummer

as Eric Leidner in Murder in Mesopotamia (1988)(story private)

Score: +1

Peter Ustinov

as Hercule Poirot in Murder in Mesopotamia (1988)(story private)

Score: +1