- James Sutton
- Â Captain Fraser Ward / ... 17 episodes, 2021-2025
- Ben Walden
- Â Tommy Benton 17 episodes, 2021-2025
- Laurie McClelland
- Â Lizzie Hathaway 16 episodes, 2022-2025
- Ollie Hatton
- Â Dr. Chris Adams 15 episodes, 2022-2025
- Michelle Willows
- Â Gina / ... 11 episodes, 2022-2024
- Dominic G. Martin
- Â Commissioner David Kanen / ... 8 episodes, 2023-2025
- Abi Louise
- Â Dr. Claudia Becker / ... 8 episodes, 2024-2025
- Connor Chadwick
- Â Chadlift / ... 8 episodes, 2022-2025
- Hugo Alyn Stephens
- Â Colonel Stevenson 7 episodes, 2021-2024
- James York
- Â Johnny Martin 6 episodes, 2024-2025
- Joseph Overton
- Â Knowledge / ... 6 episodes, 2022-2025
- Asa Holmes
- Â Jack Field 5 episodes, 2024-2025
- Jeevan John
- Â Jack Field 4 episodes, 2022
- Rebecca Hodge
- Â Eliza Ward 4 episodes, 2024-2025
- Matthew Chambers
- Â Father Malcolm 4 episodes, 2024-2025
- Alan Overton
- Â Church Soldier / ... 4 episodes, 2023-2025
- Aidan O'Connor
- Â Agent Garrick / ... 3 episodes, 2022-2023
- Vanessa McAuley
- Â Sister Sarah / ... 3 episodes, 2024-2025
- Matthew Case
- Â Knowledge 3 episodes, 2023-2025
- Charley Chacona
- Â Daisy Cooper / ... 3 episodes, 2022-2024
- Isaac Blake
- Â Michael Benton / ... 3 episodes, 2023-2024
- Casper John
- Â Young Fraser / ... 3 episodes, 2024
- Emilia Robertson
- Â Child Eliza / ... 3 episodes, 2024
- Jacob Overton
- Â Jared / ... 3 episodes, 2023-2024
- Eamon Longmann
- Â Jack Field 2 episodes, 2023
- Cath Meal
- Â Hannah Starr / ... 2 episodes, 2024
- Harry Gosling
- Â Darren Smith 2 episodes, 2022
- Jimi Wolfe
- Â Ian Adams / ... 2 episodes, 2023-2024
- Bethany Overton
- Â Airport Announcement / ... 2 episodes, 2023-2024
- Danny Overton
- Â Billy / ... 2 episodes, 2023-2024
- Dexter Harris
- Â Jacob 1 episode, 2024
- Stephen McCulla
- Â Colonel Peters 1 episode, 2021
- Christopher Whiteford
- Â Jeremy Alexander 1 episode, 2021
- Matt Barrett
- Â Mr. Jacobs 1 episode, 2023
- Reuben Roper
- Â Jaxus Kader 1 episode, 2021
- Peter M. George
- Â Mayor Chapman 1 episode, 2022
- Michael Cox
- Â Archie Hathaway 1 episode, 2023
- Jack Reeves
- Â Simon Clarke 1 episode, 2024
- Dylan Livingston
- Â Cybermen 1 episode, 2024
- Lewis Wyatt
- Â Matt 1 episode, 2024
- Cameron Hardwick
- Â Frank 1 episode, 2023
- Rosalind Whelan
- Â Margery Benton 1 episode, 2024
- Amy Saffrette
- Â Sister Rosalind 1 episode, 2024
- Abi Grace
- Â Carina 1 episode, 2024
- Connor J. Sumner
- Â Agent Bradley 1 episode, 2024
- Samuel Malvern
- Â Agent Daniel 1 episode, 2024
- Chelsea Lagan
- Â Thea Wallis 1 episode, 2024
- Lewis Wheelhouse
- Â Mr. Wedges 1 episode, 2024
- Matthew Tyrrell
- Â Dan 1 episode, 2024
- Ruaidhri Guest
- Â Kyle 1 episode, 2024
