- Zane Holtz - Paul Martinelli
- Taylor John Smith - Belford
- Michael Trucco - Devin Hall
- Mikhail Gorevoy - Admiral Dmitri Durov
- Александр Дьяченко - President Zakarin
- Игорь Жижикин - Tretiak
- Юрий Колокольников - Oleg
- Ilia Volok - Captain Vlade Sutrev
- Caroline Goodall - President Dover
- Corey Johnson - Captain
- Adam James - Captain Forbes
- Will Attenborough - Kaplan
- Michael Nyqvist - Captain Andropov
- Sarah Middleton - Liddy
- Christopher Goh - Park
- Shane Taylor - TMC Turner
- Henry Goodman - Senator from Illinois
- Colin Stinton - Senator from Iowa
- Kieron Bimpson - Nichols
- Nathan Cooper - Mess Crew (uncredited)
- Dempsey Bovell - Sonar
- Jacob Scipio - Sonar
- Ethan Baird - Sonar
- Kola Bokinni - McCaw
- Michael Jibson - Reed
- Brian Kinney - Officer on the Deck
- Cosmo Jarvis - Fathometer Operator
- Hristo Mitzkov - Volkov Sonarman
- Stefan Ivanov - Volkov Captain
- David Yelland - SECDEF
- Stuart Milligan - Secretary of State
- Aleksandar Belovski - Russian Navy (uncredited)
- Theo Barklem-Biggs - Seaman Mackinnon (uncredited)
- Mikey Collins - Brickowski
- Stanimir Stamatov
- Hristo Dimitrov
- Antony Tanev
-
Jamie Moss, Arne Schmidt
- Kim Fouche-Tipton
- Pam Dixon
- John Thompson
- Les Weldon
- Anne McCarthy
- Tucker Tooley
- Adam Bourne
- Glen Gathard
- Peter Burgis
- Kevin Penney
- Zoe Freed
Capítulo disponible en las siguientes plataformas:
