Her character in A Discovery of Witches was kept secret by Bad Wolf and author Deborah Harkness and wasn't revealed before the series was released on Sky One and Now TV.

[citation needed] Dumas played the lead role in the feature Last Breath (2017), a psychologically damaged wife using violence against her husband.

She also is one of the principal performers in Dracula Reborn by Attila Luca, a feature movie distributed on DVD in the UK.

Dumas acts in Jean-Pierre Mocky's Tu es si jolie ce soir and appeared on American and European television in Bryan Buckley's W7 campaign.

She is Candi in Paris Connections, a mystery movie by the American director Harley Cokeliss, with Nicole Steinwedell, Anthony Delon, Anouk Aimée, and Charles Dance.