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(Image: FameFlynet)

Who's this under a guardsman’s bearskin hat? Actually, it’s elementary my dear Watson – anyone could spot Sherlock Holmes in that disguise.

These Sunday People pictures show actor Benedict Cumberbatch looking like he had the Hound of the Baskervilles on his head this week as he filmed his third series featuring the legendary detective.

Benedict, 36, was assisted by real soldiers as he shot scenes at Apsley House, the former London home of the Duke of Wellington.

(Image: FameFlynet)

The house, known today as Number One, London, is near Hyde Park and just a few miles from Baker Street, Holmes’ HQ in the famous mystery tales.

Benedict, who has also starred in blockbuster movies including War Horse, has been filming the new Holmes series for the BBC since March, to be screened later this year.

He said: “I think they’re talking about the winter to show it. Around Christmas, but I’m not quite sure when.”

At least this scene is far less daring than one episode in which Benedict was spotted leaping from the roof of St Bart’s hospital in London in front of arch-enemy Professor Moriarty.

He recently said of Holmes: “His appeal is universal. He’s the ultimate outsider hero. He’s a very difficult, odd entity.

“He’s got a God complex. He suspects he’s not human and therefore everyone else is just a let-down to him.”