The Sign of Three

Summary

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.

Guest stars

• Una Stubbs as Mrs. Hudson
• Rupert Graves as DI Greg Lestrade
• Louise Brealey as Molly Hooper
• Mark Gatiss as Mycroft Holmes
• Vinette Robinson as Sgt Sally Donovan
• Lara Pulver as Irene Adler
• Amanda Abbington as Mary Morstan
• Ed Birch as Tom
• Debbie Chazen as Vicky
• Yasmine Akram as Janine