• 
  Paul Morrissey

  regizor

• 
  Dudley Moore

  scenarist

• 
  Dudley Moore

  dr. Watson / dna. Ada Holmes / dl. Spiggot
• 
  Peter Cook

  Sherlock Holmes
• 
  Denholm Elliott

  Stapleton
• 
  Irene Handl

  Mrs. Barrymore
• 
  Roy Kinnear

  Selden the Axe Murderer
• 
  Lucy Griffiths

  Iris

• 
  Joan Greenwood

  Beryl Stapleton
• 
  Jessie Matthews

  Mrs. Tinsdale
• 
  Hugh Griffith

  Frankland
• 
  Max Wall

  Arthur Barrymore
• 
  Spike Milligan

  Poliţist
• 
  Penelope Keith

  Massage Receptionist
• 
  Prunella Scales

  Glynis

• 
  Dana Gillespie

  Mary Frankland
• 
  Ava Cadell

  Marsha
• 
  Terry-Thomas

  Dr. Mortimer