Television
After an early role as Eurasian prostitute Hong Kong Anna in teleplay The Hot Potato Boys in 1963, Blake played guest roles in legal drama Consider Your Verdict. Further TV plays followed, before she eventually landed the role of Elaine Thomas in local TV drama Bellbird in 1972, remaining with the series for four years. During her time on Bellbird, Blake had roles in several Crawford Productions police procedural series, including
Division 4 (1969–1975), Matlock Police (1973–1975) and Homicide (1975).
In 1978, Blake appeared as Cook in the miniseries Against the Wind, before playing the part of Jewish mother Eva Goldman in the series Twenty Good Years, the next year. A supporting role in the Ned Kelly miniseries The Last Outlaw followed in 1980, where she appeared alongside John Jarratt and Steve Bisley.
Blake made several appearances in cult television series Prisoner (known internationally as Prisoner Cell Block H). She initially had a regular role as Evelyn Randall in season 3 (1981) and a guest role as Alice Dodds in season 5 (1983). She rejoined the series in 1986, during its eighth and final season, playing her best known role of Nancy McCormack, a Wentworth Detention Centre inmate, who took the blame for a crime her son committed.
In 1985, Blake starred in miniseries The Dunera Boys, which won her a Best Supporting Actress award at the Penguin Awards the following year. Another award-winning turn came in 1989, with her performance in miniseries Edens Lost, earning her a Best Actress accolade at both the Australian Film Institute Awards and the Sammy Awards.
She had roles in several other miniseries throughout her career including Women of the Sun (1982), Under Capricorn, and Sword of Honour (1986) and A Difficult Woman (1998). American miniseries included Salem's Lot (2004), playing Eva Prunier opposite Rob Lowe and Donald Sutherland and The Starter Wife (2007) with American actress Debra Messing, in which Blake played supporting character, Mrs. Caldecott.
Blake later had a supporting role as Louisa's feisty, activist mother, Minna Franklin in Bed of Roses from 2008 to 2011. During this period she also played Ellie, the mother of former prime minister Bob Hawke (played by Richard Roxburgh) in 2010 biographical TV movie Hawke, with her husband Norris playing his father Clem.
Blake's numerous guest roles have included Moynihan (1978), Cop Shop (1978–1981), Holiday Island (1981), Carson's Law (1983), Zoo Family (1985), and Winners (1985). Later guest credits include SeaChange (1999), Blue Heelers (2001), All Saints (2004), City Homicide (2007), Winners & Losers (2011) and Miss Fisher's Murder Mysteries (2013). She also appeared in a season 4 episode of House Husbands (2015), reuniting her with her former Last Dance co-star, Firass Dirani.