(This episode opens the December release Doctor Who - All Consuming Fire)
A sinister intelligence lurks on the streets of 1887 London - and the Doctor's only hope is to join forces with England's most notable consulting detective - Sherlock Holmes.
Based on the original 1994 New Adventures novel by Andy Lane.
'Scott Handcock, again, directs a complex, huge scale story with a light touch that gives his excellent cast room to breathe and, again, it pays off massively.' Sci-Fi Bulletin