Line Of Duty's stars fear this series will be its last. Adrian Dunbar, Vicky McClure and Martin Compston have not been given any assurances over the show's future.
And they are now concerned creator Jed Mercurio will decide it should finish. Martin, who plays DI Steve Arnott, has confirmed they are yet to be offered contracts for another series.
He said: "We've always negotiated at one at a time. Right now, it could end and it could come back." The cast will be devastated if it never returns.
Vicky, who plays DI Kate Fleming, said: "You know nothing lasts forever. It would be a massive shame when that day comes. It will be a really sad time.
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