THE Prince tried his hand at being a sci-fi baddie during a visit to the BBC’s studios in Cardiff yesterday.

Using a microphone plugged into a voice modulator, he uttered the Daleks’ famous “exterminate’’ catchphrase – leaving the show’s writer Steven Moffat thoroughly impressed.

He said: “I haven’t thought about how I could weave a meeting between the Doctor and the royal family. But Prince Charles’ attempt at being a Dalek was great.

“There would be a part in the show for him if he wanted it.’’ According to actor Matt Smith, who is due to stand down as the current Doctor, the Prince has been a secret fan of the show since he was 15.

Smith and co-star Jenna-Louise Coleman gave the future king and the Duchess of Cornwall a tour of the show’s set in Cardiff.

As well as getting to grips with a sonic screwdriver, the Prince stepped inside the famous Tardis.

Smith joked: “He’s got the makings of a future Doctor.’’ Charles also came face-to-face with some of the show’s other famous monsters, including a Cyberman and a weeping angel.