Watch: Sherlock 2015 Holiday Special Trailer

Watch a new trailer below for the upcoming Sherlock Holiday Special starring Benedict Cumberbatach and Martin Freeman.

Sherlock: The Abominable Bride airs January 1, 2016 on PBS and BBC One and is written by Steven Moffat and Mark Gatiss,.

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!