• 
  Luke Newman

  Mycroft Holmes
• 
  Lewis Wheelhouse

  Dr. John Watson
• 
  Ryan Thompson

   Inspector Forbes (3 episodes, 2014-2016)
• 
  Nathan Carter

  Sherlock Holmes
• 
  Ashley Wheelhouse

  Kidnapper
• 
  Christopher Hodgkinson

  Slaney
• 
  Jane Schorah

  Violet Smith
• 
  Val Wheelhouse

  Ms. Hudson

• 
  Trevor Winstanley

  Carruthers
• 
  Shaun Carter

  Boone
• 
  Jordan Goodier

  Inspector Lestrade
• 
  Dawn Rose

  Mrs. St. Clair
• 
  Callum Baird

  Silas Brown
• 
  Samantha Coldwell

  Grace Dunbar
• 
  Michelle Dockerty

  Maria Gibson

• 
  Matthew Dufton

  Ned Dawson
• 
  Sam Forster

  Man at the Window
• 
  Jacob Short

  Billy Batesman