Martin Freeman, Benedict Cumberbatch Martin Freeman, Benedict Cumberbatch

Sherlock will return for another four installments in 2015, including a Christmas special, Entertainment Weekly reports. The BBC series, starring Benedict Cumberbatch andMartin Freeman, will begin production on a special one-off episode and a three-episode fourth season next year.

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 "A special, plus a new series of three episodes — it's a record-breaking run!" co-creatorSteven Moffat said. "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 ...."

"Series Four!" co-creator and actor Mark Gatiss added. "At last! It's always special to return to Sherlock but this time it's even more special as we're doing...a Special! Not only THAT, we'll then be shooting three more episodes which will take Sherlock and John Watson into deeper and darker water than ever before...The whole Sherlock team are terrifically excited to return for four new adventures. The Game is on — again!"

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