As the first movement in the increasingly gloomy Peaky Blinders saga draws to a close, the question of where the Shelby gang will go after the end of season six elbows its way to the front of the pack, walking down a Birmingham street in slow-mo.

Showrunner Steven Knight has been clear that he wants to make a Peaky Blinders movie, and a spin-off series too. What's less clear is whether it'll be about the Peaky Blinders gang as we know it, and even whether main man Cillian Murphy will be involved.

This is what we know so far.

What's going to happen in the Peaky Blinders movie?

We asked Steven Knight about this recently, and he basically said he knows, but he's not going to say anything about it so stop asking please.

"The film, I know exactly what it's about," he said. "And I know what two stories it's going to tell. How the story will unfold, I don't know. What will happen after that, I want that to depend on the film. For all we know somebody is going to pop out – I think I know who it's going to be."

Knight has said on a couple of occasions in the past that he wanted to fit the main series between the end of the First World War and the first air raid siren of the Second World War, and if he sticks to that a wartime setting is the obvious thing to do.

Then again, we know that Knight's writing process is basically to sit down and let his characters chat to each other and see what happens, so we'll have to wait and see.

preview for Peaky Blinders Series 6 Trailer

What's the Peaky Blinders movie called?

No idea. Peaky Blinders: Into the Peakyverse? Peaky Blinders: Seeing Double? 2 Peaky 2 Blinders? Watch this space.

Who's going to be in the Peaky Blinders movie?

Now that's a question. Seeing as Tommy Shelby's apparently got a year to live, there's quite a lot of speculation that his abruptly introduced bastard son Duke is going to be key to the ending of season six and to the film.

There were also heavy hints that Isaiah's new gang of mates – the ones who accompanied Arthur to Liverpool to chat to Stephen Graham's Hayden Stagg – would be major players too. That would chime with what Knight's said before.

"In series six we're bringing in the new generation, and they are going to be part of what happens in film," he told Esquire. "I think it's finding those actors that you just watch and you think, there you go. There's the future."

Does that necessarily mean no Tommy Shelby though? We asked Knight whether Murphy was involved, and he was clear.

"Yes," he said. "That’s all I can tell you."

Murphy was a bit more circumspect when we put the idea of a Peaky film to him. "I’m open to ideas. I think he wants to, but I haven’t read anything."

When is the Peaky Blinders movie out?

Pfft. How long is a piece of string? How many grains of sand make up a beach? How many roads must a man walk down in slow mo before you call him a geezer?