In February 2016 Liddiard portrayed the lead character Thai in the
Tarragon Theatre production of
Kat Sandler's play
Mustard. She appeared as the lead character Ella in the web series
MsLabelled, and had the recurring role of Hanna on the
City science-fiction drama series
Between. in the British-Canadian-American period mystery series
Houdini & Doyle in 2016. In 2017, Liddiard portrayed Mary Whitney in the CBC/Netflix miniseries
Alias Grace, adapted from Margaret Atwood’s novel of the same name. Her performance was praised by the series’ writer and executive producer
Sarah Polley, who said, “She has a magic to her that I haven’t seen before… She is arrestingly smart, full of life, and brave, and you can see all of that in her eyes.” In Atwood’s novel, the character is described as being “part Indian,” indicating Indigenous ancestry. The casting was noted within broader discussions of representation in Canadian film and television, reflecting a historical pattern of non-Indigenous actors portraying Indigenous characters — a practice that has become less common amid growing calls for appropriate representation. From 2017 to 2021, Liddiard played the regular role of Mary, a morality police officer in 1920s Toronto, in the
CBC mystery-drama series,
Frankie Drake Mysteries. In 2019, she played airplane crash survivor Madelyn in the first season of the British-Canadian thriller television series
Departure. ==Filmography==