| Marta Dusseldorp | Sheila Bausch |
| Pamela Rabe | Joan Ferguson |
| Kate Atkinson | Vera Bennett |
| Katrina Milosevic | Sue 'Boomer' Jenkins |
| Robbie Magasiva | Will Jackson
(as Robbie J Magasiva) |
| Kate Jenkinson | Allie Novak |
| Bernard Curry | Jake Stewart |
| Rarriwuy Hick | Ruby Mitchell |
| Susie Porter | Marie Winter |
| Kate Box | Lou Kelly |
| Jane Hall | Ann Reynolds |
| Zoe Terakes | Reb Keane |
| Vivienne Awosoga | Judy Bryant |
| David de Lautour | Dr. Greg Miller |
| Jacqueline Brennan | Linda Miles
(as Jacquie Brennan) |
| Louisa Mignone | Zaina Saad |
| Jennifer Vuletic | Mandy Frost |
| Fanny Hanusin | Zheng |
| Chloe Ng | Nurse Shen |
| Emma-Louise Wilson | Officer Floyd |
| Brian Vriends | Dr. Mendel |
| Huw Higginson | Gavin
(voice) |
| Jim Knobeloch | Michael Schwartz, U.S. Secretary of Defense |
| Mimi Kwa | TV Reporter |
| Lucy Dening | Young Girl |
| Jonte Gregory | Grace #1 |
| Ayshia Studwick | Grace #2 |
| Bobby Macumber | Intimate Prisoner #1 |
| Abbie Johnstone | Intimate Prisoner #2 |
| Nathalie Lagrasse | Intimate Prisoner #3 |
| Nicole Domonji | Intimate Prisoner #4 |
| Jacqueline Geelan | Stunt Inmate #1
(as Jacqueline Geelen) |
| Brianna Pannekoek | Stunt Inmate #2 |
| Rick Tonna | Stunt Officer #3 |
| Chris Weir | Stunt Officer #4 |
| Erin Gregory | Nanny |
| Miriam Carr | Protection Unit Inmate
(uncredited) |
| Kerri Gannan | Inmate
(uncredited) |
| Josh Hayes | Conversion Therapist
(uncredited) |
| Sasha Hennequin | Protection Inmate
(uncredited) |
| Lauri McLennan | Inmate
(uncredited) |