Meet the Cast of Netflix's Hotly Anticipated Upcoming Series The Sandman

In flashbacks to the 1920s and '30s, Walsh will play the young version of Ethel, a young woman who has been betrayed and is struggling to survive. This won't be Walsh's first time playing a role in a Neil Gaiman adaptation: she appeared in the TV version of Good Omens as Greta Kleinschmidt. More recently, she was seen playing Martha Almond in The English Game.