Sherlock faces his biggest challenge of all - delivering a Best Man's speech on John's wedding day! But all isn't quite as it seems. Mortal danger stalks the reception - and someone might not make it to the happy couple's first dance. Sherlock must thank the bridesmaids, solve the case and stop a killer!
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 .