After a two-year hiatus, the beloved BBC series Sherlock will finally return with a new Christmas Special dubbed The Abominable Bride, airing New Year's Day on BBC One in the U.K. and on PBS in North America. To get fans ready for this highly-anticipated event, BBC One has released a new trailer, which offers our first look at the title character. Unlike the regular Sherlock series, which is set in present day, this Christmas Special takes both Holmes (Benedict Cumberbatch) and Watson (Martin Freeman) back to the year 1895.

Dr John Watson, meet Mr Sherlock Holmes. We've been here before - but what if this wasn't the modern day but the late Victorian period? What if the world's most famous consulting detective and his best friend lived in a Baker Street of steam trains, hansom cabs, top hats and frock-coats? Welcome to 'Sherlock' in 1895! Some things, though, remain reassuringly the same. Friendship, adventure and especially, murder. Why is Thomas Ricoletti a little surprised to see his wife dressed in her old wedding gown? Because, just a few hours before, she took her own life.

Mrs Ricoletti's ghost now appears to be prowling the streets with an unslakeable thirst for revenge. From fog-shrouded Limehouse to the bowels of a ruined church, Holmes, Watson and their friends must use all their cunning to combat an enemy seemingly from beyond the grave and the final, shocking truth about... the Abominable Bride! The episode has been co-written by Steven Moffat and Mark Gatiss with performances by Rupert Graves, Una Stubbs, Louise Brealey and Amanda Abbington. It is directed by Douglas Mackinnon (Doctor Who, Line of Duty).

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Sherlock is a global phenomenon, engaging audiences from Berlin to Beijing, from Texas to Tokyo. The show has sold to over 240 territories across the world, won 12 BAFTAs, 7 Emmys® and a prestigious Peabody Award as well as accolades at the Edinburgh TV Festival and the Television Critics Association. Sherlock made its mark in U.S. pop-culture being one of only three British TV shows that have appeared on the cover of Entertainment Weekly. Here's what Sherlock co-creator Steven Moffat had to say in a statement.

Sherlock: The Abominable Bride will be shown on Masterpiece on PBS stations and pbs.org the same day as the UK on Friday, January 1 at 9 PM ET, with an on-air encore on Sunday, January 10 at 10 PM ET. Benedict Cumberbatch and Martin Freeman will be back for Sherlock Season 4, debuting at an undetermined date in 2016. Take a look at the new trailer for The Abominable Bride, before it airs on New Year's Day.