Warning: contains spoilers forPeaky Blindersseries 4 episode 1.

Tommy packs things away, says Cillian Murphy.

Hes a really, really complicated man emotionally and he doesnt deal with stuff.

He doesnt spend money on therapy, thats for sure.

He doesnt really emotionally process things properly.

Any progress hed made emotionally through being married and through her, hes gone back.

Whatever opening up or defrosting of his emotions that was happening then has stopped and hes atrophied again emotionally.

I think he has a very complicated relationship with women.

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And in series four, with one woman in particular.

Its Aunt Polly who he trusts most, Murphy says.

When they were all off at the war in the trenches, she was running the whole thing.

Despite all the tension and conflict that goes on between them, he cant do it without her.

Series four finds Tommy in that situation where hes just isolated himself.

The situation in question is a mafia vendetta in retaliation for the murder of Vicente Changretta.

They suffer as a result of it.

Obviously the victims do quite badly, he laughs.

But Tommy does when hes carrying out the violence or when its being inflicted upon him.

That consequence puts the Peaky Blinders, says Murphy, under the greatest threat that theyve ever been under.

In terms of the mafia, you cant really get bigger than that.

[Tommy] recognises that this is a different level.

), and the family boss also has a new look to go with the New Years Honour.

He needs glasses now, explains Murphy.

After one of his many ferocious beatings he takes.

Also, hes moving on in age.

Does the OBE signify a real change for Tommy?

One thing thats never changed about Tommy is his stillness and menacing stare.

I dont think Im a naturally menacing person!

Its acting really, isnt it.

It felt to me the energy was more still and quieter, that was more appropriate for him.

Obviously theres the violence but generally how he comports himself is quite reflective.

Hes got serious brainpower, he goes on.

Hes got this incredible drive and momentum and engine in him.

At heart, though, Tommy still holds on to his gypsy upbringing.

For such a rationalist, says Murphy, he completely embraces the whole gypsy culture and spiritualism.

He totally believes thats for real, which seems at odds with his drive.

Politically, says Cillian, it gets very interesting between the two characters.

The real threat of series four though, comes from Adrian Brodys character, mafia man Luca Changretta.

What can we expect from the two?

Theres going to be a showdown at some point, promises Murphy.

Peaky Blinders series 4 airs on Wednesdays at 9pm on BBC Two.