- Thomas Brodie-Sangster
- Â 2nd Officer Hawkins 11 episodes, 2024
- John Malkovich
- Â Chief Engineer Pollard 11 episodes, 2024
- Nathalie Emmanuel
- Â Maud Hawkins 10 episodes, 2024
- Craig Robert Young
- Â Apprentice Jones 10 episodes, 2024
- Brian Cox
- Â Robert Dodds 10 episodes, 2024
- John Altman
- Â Bosun Fletcher 10 episodes, 2024
- Blair Redford
- Â Deck Hand Preston 9 episodes, 2024
- Nicholas Hutchison
- Â Mr Miller 9 episodes, 2024
- Zac Pile
- Â Cadet Housden 9 episodes, 2024
- Harry Hamlin
- Â Able Seaman Mortimer 8 episodes, 2024
- Juliet Aubrey
- Â Joy Hawkins 8 episodes, 2024
- Paul Telfer
- Â Able Seaman McNeil 7 episodes, 2024
- Euan Shedden
- Â Galley Boy Jamieson 7 episodes, 2024
- Rupert Vansittart
- Â Morris Hawkins 6 episodes, 2024
- Hugh Fraser
- Â Justice Langton 6 episodes, 2024
- Timothy Blore
- Â Kapitan Prien U47 6 episodes, 2024
- John Mawson
- Â Captain Waite 6 episodes, 2024
- Misha Crosby
- Â 3rd Engineer Willey 6 episodes, 2024
- Christopher Tester
- Â Ordinary Seaman Cottes 5 episodes, 2024
- Stephen Critchlow
- Â 2nd Steward Halloran 5 episodes, 2024
- Karim Kronfli
- Â Storekeeper Davies 5 episodes, 2024
- Declan Michael Laird
- Â Greaser Boyle 4 episodes, 2024
- Elizabeth Arends
- Â Alice Clarke 4 episodes, 2024
- James Simmons
- Â Mr Haywood 4 episodes, 2024
- Mark Prendergast
- Â Able Seaman McLennan 3 episodes, 2024
- Chris Finney
- Â Chief Officer Wilson 3 episodes, 2024
- Wink Taylor
- Â Winston Churchill 3 episodes, 2024
- Tehmina Sunny
- Â Amanda O'Shea 2 episodes, 2024
- Klemens Koehring
- Â 1st Lieutenant Admiral Scheer 2 episodes, 2024
- Jenae Altschwager
- Â US TV Anchor 1 2 episodes, 2024
- Daniel Collard
- Â Kapitan Kranke Admiral Scheer 2 episodes, 2024
- Laurence Fuller
- Â Commander Williams 2 episodes
- Richard Sanderson
- Â Captain Fegen HMS Jervis Bay 1 episode, 2024
- David Monroe
- Â Stevedore Foreman 1 episode, 2024
- Rachel Rath
- Â Assistant Coastguard 1 episode
- Kevin Marron
- Â Coastguard 1 episode
- Isaac Lancel-Watkinson
- Â Robbie 1 episode
