- Jack Walsh - Foreman Smith
- Joely Richardson - Countess Markievicz
- Anna Elizabeth McGrath - Belinda
- Đorđe Marković - Worker #2
- Ger Carey - Bernie Doyle
- Frank O'Sullivan - Steel Company Manager
- Frank O'Sullivan - Manager Roll Comp (uncredited)
- Gina Moxley - Mother Superior
- Derek Reid - Pirrie's Butler
- Derek Reid - Pierre's Butler
- Emanuela Postacchini - Sahra
- Don Baker - Ryan
- Eve Macklin - Lord Pirrie's Secretary
- Eve Macklin - Lord Pirrie's Secretary (uncredited)
- Owen Sharpe - Liam - Stable Hand
- Terry Byrne - Doctor
- Patrick J Molloy - Paedar
- Donncha Crowley - Registrar Clerk
- Neilí Conroy - Mrs. O'Connell
- Will Irvine - O'Farrell
- Jonathan White - Francis Carruthers
- Kate O'Toole - Lady Carlton
- Tim Delap - Naval Lawyer
- David Pearse - Mr. Doland
- Michael McElhatton - Albert Hatton
- Gerard McCarthy - Ashley Stokes
- Caolan Byrne - Jimmy Smith
- Steve Gunn - Bill Armstrong
- Liam McMahon - Arthur McAllister
- Gabrielle Reidy - Edith Hatton
- Chris McHallem - Committee Member (uncredited)
- Chris McHallem - Committee Member
- Tommy O'Neill - Lorcan
- Gavin O'Connor - Billy Wilson
- Eva Bartley - Prison Warder
- John Kavanagh - Edward Carson
- Denis Conway - Magistrate
- Uroš Urošević - Lead Worker
- Denise Gough - Emily Hill
- Eleanor Methven - Lady Pirrie
- Igor Filipović - Worker
- Igor Filipović - Worker #1 (uncredited)
- Charlotte Bradley - Mary McCann
- Neve Campbell - Joanna Yaegar
- Sandy Kennedy - Sarah's Mother
- Hazel Doupe - Sarah
- Jennifer Laverty - Ticket Clerk
- Branwell Donaghey - Michael McCann
- Gray O'Brien - Bruce Ismay
- Jonathan Forbes - Eddy Hatton
- Chris Noth - J.P. Morgan
- Martin McCann - Conor McCann
- Karl Shiels - Neil Sutherland
- Paul Herwig - Florian Altenberg
- Robert Whitelock - Winston Churchill
- Richard Flood - Samuel Johanson
- Ronnie McCann - Cherry
- Steven Blount - McQueen
- Frank Melia - Delegate
- Anthony Morris - Farmer
- Owen Roe - Sir Norman Hill
- Noel O'Donovan - Steamship Clerk
- Edoardo Leo - Andrea Valle
- Liam Cunningham - Jim Larkin
- Frank McCusker - Charles Stokes
- Liam Carney - Sean Malone
- Barry McEvoy - Chorley
- Jonathan Harden - Walter Hill
- Terence Keeley - Jack Lowry
- Bill Murphy - Bremner
- Michael Cochrane - Captain Smith
- Pat McGrath - Kelly's Landlord
- Barry Barnes - Father Thomas
- Ned Dennehy - Brendan Byrne
- Nikola Krneta - Crew Member #1
- Nenad Pećinar - Crew Member #2
- Andreja Maričić - Purser - Titanic
- Siniša Ubović - White Star Official
- Vincenzo Alfieri - Giacomo
- Stanley Townsend - Rex Riley
- Michèle Forbes - Donovan Woman
- James Flynn - John Gordon
- Michael Liebman - O' Hearn
- Francesca Brill
- Alan Whiting
- Stefano Voltaggio
- Aldo U. Passalacqua
- Lissy Holm
- Leo Davis
- Michael Garland
- Milenko Vujic
- Paul Donovan
- Maurizio De Angelis
Kevin Zegers interpreta a Mark Muir en la serie.
Derek Jacobi interpreta a Lord Pirrie en la serie.
Alessandra Mastronardi interpreta a Sofia Silvestri en la serie.
Valentina Corti interpreta a Violetta Silvestri en la serie.
Massimo Ghini hace el papel de Pietro Silvestri.
Ian McElhinney interpreta a Sir Henry Carlton en la serie.
Billy Carter interpreta a Thomas Andrews en la serie.
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