They have been hard at work filming a highly anticipated one-off special of Sherlock.

And the stars of the show Benedict Cumberbatch and Martin Freeman were seen on set once again on Saturday as they filmed more scenes in London.

Getting to work on a recreation of Baker Street, both actors were dressed to the nines in their Victorian-era costumes.

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Back at it: Benedict Cumberbatch was seen on set once again as he filmed more Sherlock scenes in London on Saturday

Having already filmed scenes in Bath, fans are eagerly waiting to discover what is in store in the Christmas special of the present-day adaptation of Sir Arthur Conan Doyle’s franchise.

The BBC confirmed last year that the popular detective show would return in 2015 with a special, followed by a fourth series consisting of three episodes.

The upcoming series of the popular show, which was created by Steven Moffat and Mark Gatiss, is set to be 'the most shocking and surprising series of Sherlock yet' according to the BBC.

Suspence: The talented actor has been hard at work filming a highly anticipated one-off special of Sherlock

Dapper: Getting to work on a recreation of Baker Street, both Benedict and Martin Freeman were dressed to the nines in their Victorian-era costumes

Check it out: The 43-year-old star was dressed in his full costume as he cut a dapper figure in a vintage three-piece suit which was worn underneath a dark brown coat

'Of course, it's far too early to say what's coming, but we're reasonably confident that the very next thing to happen to Sherlock and John, is the very last thing you'd expect,' Moffat revealed last year.

He is also quoted saying: ‘I suspect it’s going to be end of year-ish, and as everyone has seen, it’s Victorian'.

As well as keeping busy filming for the hit TV show, Benedict is in the midst of awards season fever, as he has been nominated for several top prizes for his portrayal of Alan Turing in The Imitation Game.

Different look: Martin - who recently starred in The Hobbit trilogy - could be seen in character as Dr John Watson

Hat's off to them: Having already filmed scenes in Bath, fans are eagerly waiting to discover what is in store in the Christmas special of the present-day adaptation of Sir Arthur Conan Doyle’s franchise

Guarded: The BBC confirmed last year that the popular detective show would return in 2015 with a special, followed by a fourth series consisting of three episodes

On Sunday February 8, he'll appear at the BAFTAs, for which he's nominated for the Leading Actor prize.

And later in February, the British actor will be hoping to score his first Oscar award, as he goes up against the likes of Eddie Redmayne and Michael Keaton for the most prestigious prize of them all.

Benedict was recently at the centre of scrutiny following his comments in an interview, in which he used the term 'coloured' while discussing the lack of opportunities for black actors.

It's a secret: The upcoming series of the popular show, which was created by Steven Moffat and Mark Gatiss, is set to be 'the most shocking and surprising series of Sherlock yet' according to the BBC

Surprises: Moffat revealed last year, 'Of course, it's far too early to say what's coming, but we're reasonably confident that the very next thing to happen to Sherlock and John, is the very last thing you'd expect'

Braving the cold: Benedict was seen wearing a large coat to keep warm int between takes while his dark locks were slicked back off his head

He has since apologised for his ill-advised comments: 'I'm devastated to have caused offence by using this outmoded terminology.

'I offer my sincere apologies. I make no excuse for my being an idiot and know the damage is done.'

Benedict - who is currently expecting his first child with fiancee Sophie Hunter - shared that his parents were actually keen for him to become a barrister rather than an actor.

Time travel: Extra were seen dressed up in their costumes while horses and carriages were also used on set

All smiles: Benedict seemed to be in a cheerful mood as he sat in the carriage alongside Martin

'[Acting is] a very odd, peripatetic, crazed, out of your control work and social schedule. It's very hard to plan a family life, yet alone know where the next pay cheque is coming from so they worked very, very hard as my parents, and actors, to afford me an education whereby I had the opportunity and the privilege to try and channel myself towards other goals,' he said.

His parents Wanda Ventham and Timothy Carlton were both actors, and wanted him to pursue a different career.

Looking familiar: Moffat is also quoted saying: ‘I suspect it’s going to be end of year-ish, and as everyone has seen, it’s Victorian'