The new series of Sherlock is rumoured to be back on TV for New Year in the UK.
The UK premiere date is yet to be confirmed, but speculation has began the third series will air on BBC One on New Year's Day, the same date series two began last year.
But co-writer Mark Gatiss tweeted: "You may have noticed there's a US airdate for #Sherlock but we DO NOT have one yet for the UK. I don't know how much plainer I can be."
The end of the last series saw Sherlock apparently plunging to his death from the roof of St Barts Hospital in London. But the new series will reveal how Sherlock, played by Cumberbatch, managed to survive and fake his own death.
Sherlock's third series is made up of three episodes - The Empty Hearse by Mark Gatiss, The Sign of Three by Stephen Thompson and His Last Vow by Steven Moffat.
The series will feature the arrival of Mary Morstan, John Watson's love interest, played by Martin Freeman's real life partner Amanda Abbington.
Benedict recently told The Guardian about the new series. He said: "Well, there's a reunion that doesn't necessarily go to plan.
"And there's a bonding experience that throws Sherlock and Watson back together in a very firm way.
"And there's a new union as well, in the shape of a marriage, which Sherlock takes part in, so we see that."