READ MORE: Death in Paradise: How will Sara Martins return?Grace Verdinikov is played by British actor Lia Williams in episodes five and six.
She is one of the suspects in a murder enquiry as well as being good friends with Catherine Bordey. Williams has had an acclaimed career so far on stage and screen.
Some of her roles include playing Wallis Simpson in The Crown and Edith Montgomery in Doc Martin. Adrian Schiller joins the cast as an acclaimed pianist and Grace's husband Pasha Verdinikov in the show.
Viewers will also recognise Schiller from Beauty and the Beast, Suffragette and Bright Star. Grace and Pasha's son Joseph is played by Sam Retford in the new episodes.
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