Filmmaking
Tass has made many films with her husband and business partner, filmmaker David Parker, who has written, co-produced, and shot many of her films. They established Cascade Films in 1983, and co-produce their films.
Her debut feature film as a director was Malcolm, which she co-wrote with Parker. After Australian distributors were uninterested in the film, Tass, Parker, and collaborator Tim White took it to the United States, where there was a bidding war for it. Released in 1986, the film proved to be a critically acclaimed and box-office hit, winning 21 international awards and 8 Australian Film Institute Awards, including Best Film and Best Director.
In 1988, with the backing of United Artists in the US, Tass directed and co-produced the comedy Rikky and Pete, which was again successful around the world. The following year, she directed and produced The Big Steal (released in 1990), which won three and was nominated for six AFI Awards, as well as being an international hit.
Other feature film works by Tass include Mr. Reliable (1996), which won three AFI Awards; and Amy (1997), starring Rachel Griffiths and Ben Mendelsohn, which won 23 international awards.
Her first and only theatrical film directed in the United States was Pure Luck, produced for Universal Pictures and starring Martin Short and Danny Glover. It was released in August 1991.
In 1993, she produced the TV miniseries Stark, based on the bestselling novel by Ben Elton, which was later also released as a film.
From the 2000s, Tass directed several telemovies in the US, including The Miracle Worker (2000), Child Star: The Shirley Temple Story (2001), Undercover Christmas (2004), and Felicity: An American Girl Adventure (2005). Child Star: The Shirley Temple Story was an American Broadcasting Company TV film production of Shirley Temple's autobiography of the same name. Filmed by Parker, the film stars Ashley Rose Orr as Temple, Emily Anne Hart as teen Shirley, Connie Britton, Colin Friels, and Hinton Battle. It was filmed in Port Melbourne. She directed Fatal Honeymoon, a 2012 telemovie, produced by US cable channel Lifetime, starring Harvey Keitel. Tass has directed films and TV series for the BBC, CBS, Disney, Universal Studios, and Warner Bros.
Matching Jack, about a mother's search for a potential donor for her son with leukaemia, was shot by Parker. It premiered at the Melbourne International Film Festival in July 2010.
Oleg: The Oleg Vidov Story (2021), written by Cory Taylor, Gregor Zupanc, and Vidov, is a feature documentary about the Russian actor and filmmaker Oleg Vidov ("the Russian Robert Redford"), who defected from the USSR and went to the US in 1985, after being targeted by the Russian government led by Leonid Brezhnev. The film is narrated by Scottish actor Brian Cox, with Costa Ronin playing Oleg in flashbacks, and features interviews and archival footage with Walter Hill, Amanda Plummer, Arnold Schwarzenegger, Alexander Mitta, Milena Dravic, Mikhail Baryshnikov, and others. It had its world premiere at the Moscow International Film Festival in April 2021, and its Australian premiere at Cinefest OZ in Perth in August 2021. Tass had been friends with Vidov in the US, and owing to her Slavic heritage felt some connection to Russian culture, and both wanted to show some of the richness of that culture, but also the "criminals" who led the USSR. The film was screened on SBS TV and streamed on SBS On Demand from June 2021.
She has said about the process of filmmaking with her husband:What it takes is a lot of knowledge and fastidiousness and dedication, and working with actors who are equally as dedicated… I just needed to make sure to lay out what we're gonna do, and then together we just create, and therein lies the joy.