Michael Caine
Dr. Henry Jekyll / Mr. Edward Hyde
Joss Ackland
Dr. Charles Lanyon
Ronald Pickup
Jeffrey Utterson, Esquire
Kevin McNally
Sergeant Hornby
Lionel Jeffries
Jekyll's Father
Lee Montague
Inspector Palmer
Miriam Karlin
Mrs. Hackett
Lance Percival
Beresford Mount, Prince's Private Secretary
Frank Barrie
Poole the Butler
Martin Jacobs
Young Man (as Martyn Jacobs)
John Scarborough
Auctioneer
Peter Gale
Lanyon's Butler
David Michaels
Medical Student 1
Simon Adams
Medical Student 2
Richard Dixon
Medical Student 3
Samantha Womack
Young Maid (Margaret) (as Samantha Janus)
Margaret Rawlings
Jekyll's Mother
Michael Stainton
Duty Sergeant
Terence Plummer
Big Detective
Craig Crosbie
Lab Technician
Prentis Hancock
Vendor/Detective
