The Scottish-born star of Succession has a career of over 50 years behind him, breaking through as King Lear many years before portraying media mogul Logan Roy.
"I think he's one of the most misunderstood characters on television," Cox says.
"He's been brutalised. And it has turned him into what everyone thinks is a monster. But I don't see him as a monster, then I wouldn't have been able to play him.
Misunderstood father figure
He talks about Logan Roy – the dark star of Succession around which the whole story rotates. Who refuses to let his spoiled children take over his Fox News-like media empire. And as enough for most people who've seen the award-winning drama-comedy, comes across as a pretty bad, and terrifying, dad.
But Brian Cox disagrees.
- All he asks is for his children to sharpen up. What he tells them is "all of this can be yours if you want it. But you have to behave and don't give me any of your shit." But do they? No. They just behave disgustingly.
"We have a tendency to judge the parent for the child. But the child grows up. I believe that after the age of 21, there is nothing to blame.
"Dissatisfied with the human experiment"
In the fourth and final season of the award-winning dark comedy, aging Logan Roy is isolated, abandoned by his children and wife, and begins to ponder the end of the story, which has so far been awarded dozens of Emmy statuettes and five Golden Globes.
What similarities are there between you and Logan?
"We have some similarities. We are both dissatisfied with the human experiment. The difference is that I'm an optimist. Humanity is possibly at the darkest part of its journey, but I think it will get better.