Anthony Hopkins did not receive an Oscar nomination for portraying Torvald in A Doll's House.
A Doll's House follows a wife Nora (Claire Bloom) reexamining her relationship with her husband as outside forces grant a new perspective on her situation.
Anthony Hopkins plays the role of Torvald which you could argue is all how it leads to the climactic moments, and whatever the performer does to lead towards that moment. Torvald isn't necessarily immediately distressing and Hopkins grants the allowance for the view Nora of her relationship with Torvald initially. Hopkins plays the role initially with a seeming levity while doing his famed Olivier impression throughout his performance which becomes particularly noticeable late in the film. Although I wouldn't say this is either a masterstroke or a distraction, just a choice that works as well for Torvald as would've been the case if Hopkins had chosen to maintain his typically already regal voice. Hopkins presents a potentially loving state as he welcomes Nora into his embrace, and while certain lines speak towards this controlling attitude of the man, treating her more so as a doll than a woman that is his equal, however, the way Hopkins delivers these lines is pivotal. He doesn't subvert them but he does present them with a bit of jovial quality as though one may be fooled to interpret that this is just Torvald's way of being playful. Hopkins doesn't immediately raise an alarm, he indicates what is really going in within Torvald's manner as the aggressively forceful and controlling man, but doesn't enforce the idea. Hopkins's performance manages to naturally articulate both sides with quite an ease of expression within his performance. Hopkins never directly converses with her in a way much as he's talking to her. He blithely speaks with just accentuation on the random joy he seems to get out of her, without more than a careless simplicity within the process. He doesn't connect with her as much as he admires her. The admiration of taking in the joys with the simplicity of it that isn't anything more than that with Hopkins's presentation.
The reality of this is broken by Nora having to deal with an earlier indiscretion that may destroy their entire situation, which could be avoided if Nora could convince Torvald to not fire a man who has evidence of the indiscretion. Hopkins reveals some of Torvald's behavior more openly by the level of dismissiveness as Nora pleads to avoid the trouble by not firing the man, and Hopkins presents not a moment of hesitation in ignoring the request. It isn't even something that dances in his mind for a moment he simply moves on. We see this dismissiveness all the greater even when the two ready for a party by Nora practicing her dancing while Torvald plays the piano. Hopkins's directing of her initially presented with that initial joviality yet this quickly segues towards frustration with her inability to do exactly what he says. Hopkins presents this frustration in a decidedly thin way, and effective as such, reinforcing again treating Nora as a mere doll, and when she's not doing as he says, he reacts not as a loving husband rather just a boy who doesn't like that his toy is not working as it should. Eventually this leads to Torvald discovery the indiscretion which Hopkins's performance is big, however big in a way I find gets to the heart of it, which is as the true brat just seeing his plaything doing something he doesn't like. Hopkins lashing out against her with the fury not of an intelligent man, but a fully petulant child. Hopkins conveying someone fully taking his wife for granted in every word and treating her without a second thought. Showing a man who views her with less than any but a source of joy, and when not that, as nothing. When Nora pushes back against him, Hopkins is terrific in his way of deconstructing the state of Torvald. Hopkins eases back towards calm, however even in calm the distress Hopkins shows in this disbelief and confusion is still with a brittle quality of not a loving man but a using man. There is so little love in it of a person just in a way a weak affection. Hopkins manages to deliver well a worthless sort of humanity. Hopkins shows that Torvald is hurt by the revelation but even in that emotional harm, it is without true depth of feeling towards him. It is with a worthless selfishness all the same. Hopkins is great throughout this final sequence against Bloom, falling into this submission that he presents as the man trying to find some truth of emotion however still failing to deliver anything but self-pity. Hopkins is moving in the sense he does make the emotion so real, while maintaining the fundamental flaw of the man. Hopkins gives a striking performance as he makes Torvald dynamic within his work, yet while doing so shows the little depth within the man all the same.