Tommy and Alfie started working together again in season 5

With fans desperate for more episodes, it’s no surprise they’ve been taking to Reddit to map out what they will happen when Tommy Shelby (Cillian Murphy) and co return.

The latest debate surrounds who betrayed Tommy and sabotaged his plans to assasinate British fascist Oswald Mosley (Sam Claflin).

The hit, due to take place at a political rally, fell through when Tommy’s sniper was eliminated before he could take the killing shot.

As all manner of names were thrown into the mix as potential suspects, including Johnny Dogs (Packy Lee), one fan predicted that Tommy would actually strengthen bonds with two key figures in his life as he tracked down the rat.

The pair previously tried to kill each other

User Curley_10 began: “I’ve seen many posts implicating both Alfie and Ada, let me tell you why they wouldn’t betray Tommy.

“Ada is a communist, as much as she doesn’t want to believe it, she is.”

“She married and had a baby with known communist Freddie Thorne, and believed in the cause,” they went on.

“Although communism isn’t the farthest cry from fascism, Ada has made it known that she despised fascism and everything about it.

Tommy and Ada have forged a close bond running the family business

“Fascists are also racist, she is not. She has no reason to betray Tommy personally and wants to help him.”

Moving on to Tomy Hardy’s character, they continued: “Alfie? Alfie? We can’t be serious… Alfie is a Jewish man, and has been his entire life – in his words since his death he has been immortalised as a Jewish god.

“Now the argument for Alfie is pretty substantial, he betrayed Tommy numerous times in the name of alignment, and of rum trafficking in the States.

Emphasising the character’s connection to his faith, they went on: “He loves Judaism so much he even got Luca’s men to be circumcised in the name of his belief.

Alfie is played by British actor Tom Hardy

“Let’s put it into future perspective: quite plainly, fascism is nazism, and a decade in the future the Jews are eliminated in the millions in the name of nazism.”

The post was quickly flooded with upvotes and messages of agreement.

One thing’s for certain – Tommy will need all the loyal allies he can get as he takes on Mosley once again.

Theories around season 6 have come in thick and fast in recent weeks.

Fans previously convinced themselves Johnny was the one to betray Tommy Shelby – and he’ll be murdered in the upcoming episodes.