UPDATE: The below tweet suggesting audience members were not shown the episode's final four minutes is reportedly incorrect.

This Sunday (15 January) sees the latest season of Sherlock draw to a close after a controversial run of episodes that has seen shock deaths and unexpected twists.

A lucky number of fans were granted the opportunity to see the finale at a preview screening - and their response has been as feverish as you'd expect.

If the reaction is anything to go by, the episode - titled 'The Final Problem' and co-written by showrunners Steven Moffat and Mark Gatiss - will leave fans with an agonising wait for new episodes (especially if this theory is to be believed).

Even more excitingly, the screening - which took place at the BFI - didn't include the final four minutes meaning the outcome of season four will undoubtedly throw a curve ball the way of its audience.

Sherlock stars Benedict Cumberbatch and Martin Freeman and this year saw the introduction of a brand new villain played by Toby Jones.