Dichen Lachman (/ˈdiːtʃən ˈlækmən/; born 22 February 1982) is a Nepalese Australian actress and producer, best known for appearing in the soap opera Neighbours as Katya Kinski and Joss Whedon’s science fiction drama television series Dollhouse as Sierra. Lachman portrayed Suren in the supernatural drama television series Being Human as a main character during the show’s second season.