One mysterious case in particular baffles Scotland Yard - but Sherlock is more interested in a seemingly-trivial detail. Why is someone destroying images of the late Prime Minister Margaret Thatcher? Is there a madman on the loose? Or is there a much darker purpose at work? Something with its roots deep in Mary Watson's past…
Elenco: Benedict Cumberbatch , Martin Freeman , Rupert Graves , Mark Gatiss , Una Stubbs , Amanda Abbington , Louise Brealey , Lars Mikkelsen , Mark Gatiss , Rupert Graves , Russell Tovey , Una Stubbs .