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BBC bosses are going to attempt to regenerate ALL the former Time Lords, reuniting them in a Doctor Who special.

Seven of the surviving actors are set to return in cameo roles on the 3D episode to mark the 50th anniversary of the sci-fi favourite.

And chiefs also want to involve the first three Doctors – William Hartnell, Patrick Troughton and Jon Pertwee – who have died since the first episode screened back in 1963.

They would be included in the feature-length special using computer generated images and old footage.

Doctors of old Tom Baker, 79, Peter Davison, 61, Colin Baker, 69, Sylvester McCoy, 69, Paul McGann, 53, Christopher Eccleston, 48, and David Tennant. 41, are thought to have agreed to take part alongside current star Matt Smith, 30.

This week writer and producer Steven Moffat – who is notoriously secretive – admitted: “Getting the other Doctors involved would be very fitting for the anniversary episode, wouldn’t it?”

He is still writing the special, which is due to be filmed this spring.

The plot is a fiercely-guarded secret, but Moffat said the fact the original show was delayed by more than a minute by an extended news bulletin would be referenced.

The first episode with Hartnell as The Doctor was broadcast on November 23 – the day after President Kennedy was shot.

The special episode is likely to provide the exit point for Smith, who is expected to regenerate into the 12th Time Lord.

Smith, set to star in movie How to Catch a Monster, admitted he would love to work with his predecessors. “How amazing would it be to see Tom Baker? Can you imagine seeing him back in the scarf? That would be so cool,” he said.

“Paul McGann is a great Doctor – I say bring back Chris and Dave too.”

If bosses manage to pull off the coup, it will be the biggest gathering of Doctors since 1983, when five were reunited for the 20th anniversary.

Thank goodness there’s plenty of room in the Tardis for all of them...