The Sign of Four
Overview
Mary Morstan has received a pearl in the post every year since her father's disappearance. This leads Holmes and Watson to the truth about a secret pact between four convicts during the Indian Rebellion of 1857.
Cast

Jeremy Brett
Sherlock Holmes

Edward Hardwicke
Dr. John Watson

Jenny Seagrove
Mary Morstan

Ronald Lacey
Thaddeus und Bartholomew Sholto

John Thaw
Jonathan Small

Emrys James
Inspector Athelney Jones

Alf Joint
McMurdo

Kiran Shah
Tonga
Terence Skelton
Captain Morstan

Rosalie Williams
Mrs. Hudson

Robin Hunter
Major Sholto

William Ash
Jack Smith