Peter McDonald, Ruth Bradley, Perdita Weeks, Jenna Coleman, Noah Reid,
Maria Doyle Kennedy, Celia Imrie, Lloyd Hutchinson, Ralph Ineson, Olivia Darnley, Shane Attwooll, Sally Bankes, Jonathan Howard, Grainne Keenam, Iain McKee, Mark Lewis Jones, Sophie Rundle, Tom Aldridge, Ross Armstrong, and Margaréta Szabó.
I can link you to a page with photographs from AMC's The Terror. Episodes 1 - 7 used Hungarian extras (ship scenes on Erebus and Terror and scenes in London), so some of them could have worked on the 2012 Titanic miniseries.
Well, It depends if it have to be such changes as you mentioned above or historical inaccurates which there are more than enough. Let's leave it as story even if unnacurate, and focus on plot-holes.
1. Explain how Turnbull knew about italians and why Moody didn't asked seamen who locked them but ask Turnbull who can't know anything.
2. Assigning names for more crewmen. At very least for "Baxter", "Hill", "Bradley" and "Scarrott".
3. Explain why was Turnbull so long down in corridors until it floodes, why he didn't went up by staircase at dining room but why did he walked down around the cupboard instead.
4. Add "Baxter" and "Hill" to "Bradley" who is trying to right up Collapsible B. (Krisztián said that he jumped into the water. He doesn't remember his on-costume but I suppose it was different as no Third Class Steward is seen nearby Collapsible B or when Jack Thayer jump into a water).
5. Show fate at very least of Turnbull and Taylor.
If I will occur something else I'll let you know. What changes do you wish?
Here are my mistakes that irk me and I would wished were done right:
1. There were too many seaman on the 2012 mini-series set, the real Titanic had 31 seamen and there ages varied from 19 to 48. And there was hardly any more firemen / trimmers on set.
2. There were no mention of the Engineers, Jack Phillips or Harold Bride, the Kitchen staff for the Victualling crew, or Isidor and Ida Straus.
3. The omission of the extra playing Quartermaster Hichens and replacing his actions with Seaman Holmes. They should have had Luke Norris playing Quartermaster Hichens instead of that extra or renamed the character Quartermaster Holmes.
4. The false portrayal of the Chief Steward. Based on what I have learned about the Titanic's Chief Steward Andrew Latimer; he was well liked by his staff and the passengers. And most importantly he didn't work in the dining room.
5. They should have mentioned that Murdoch and Lightoller didn't have time to change their rank uniforms. Speaking of Lightoller, he should have not been mingling with the passengers let alone Dorothy Gibson.
7. The class structure wasn't properly portrayed correctly, especially with the Church sequence in the First Class Dining Room. Then what was the point of Steward Turnbull if the Steerage can go with the First Class to Church? Julian Fellowes having much research with Gosford Park and Downton Abbey should have known better.
8. The mini-series had an opportunity to put a lot of the myths of the Titanic to rest; like the Astor rescuing the dogs, the false rumor of the À La Carte Restaurant being locked in a room, Astor being crushed by the forward funnel, and show some truth about Duff-Gordon's actions. But it didn't.
I agree! Especially the seamen, miniseries portrays many of them to be 50's or 60's. What are you saying on my previous ones? There are anothers:
1. Bruce Ismay was not racist towards the italians.
2. Third Class is shown to be kept from going to their own space. Before the sinking sequence the gates were opened and passengers were going up.
3. Hart was not supposed to walking through First Class area (A Deck) before met Mabel.
4. Add numbers to the lifeboats.
5. Change attitude not only of Wilde, but also of Boxhall and Moody. Boxhall was exclusively firing the rockets almost whole time. Moody is known as hero who (even if he had right to be already gone in lifeboat) he laid his life for the others.
6. Add more named Third Class Stewards.
7. Show William Denton Cox and Albert Victor Pearcey.