 In 2010, she had a guest starring role as Emily in the Easter special of Jonathan Creek ("The Judas Tree") and appeared in an episode of Lynda La Plante's ITV drama serial "Above Suspicion".Walter appeared in the first episode of Christopher Guest's HBO mockumentary-style comedy "Family Tree".Since 2015, she has been a regular performer in the BBC's children's historical sketch comedy "Horrible Histories".