The new 'Sherlock' season four teaser shows flood waters rising at 221b Baker Street

The BBC have released an intriguingly ominous new teaser for the upcoming fourth season of hit detective series 'Sherlock' – and the game is on to work out what it means. 

The teeny tiny teaser sees Sherlock and his ever-loyal Watson sat in 221b Baker Street, as flood waters rise around them. 

What's going on? Really, who knows. But when it comes to 'Sherlock', we know it's safe to assume everything means something. 

Floating in the water we can see Sherlock's violin and (after a hefty zoom session) some sheet music to a song titled 'Miss Me?' A nod to Moriarty and the threat of his return, perhaps? 

There's also a tea cup, a copy of William Shakespeare's 'Henry V' and a fancy embroidered slipper bobbing about. 

We already know what the first two episodes in the much-anticipated series will be called – 'The Six Thatchers' and 'The Lying Detective' – so could this teaser, titled Rising Tide, be a clue to the name of the third and final episode?  

Let us know what you think in the comments section below... 

'Sherlock' is back on BBC1 on New Year's Day. 

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