Revealing mistake: While Holmes and Watson are investigating the crime scene, there is a shot of them that shows the dead man's hand. His hand is visibly shaking, revealing the actor is struggling to maintain the position of his hand.
The Return of Sherlock Holmes (1986)
1 revealing mistake in season 1
Starring: Jeremy Brett, Rosalie Williams, Edward Hardwicke
Factual error: Holmes and Watson walks through a colonnade. Clearly visible in the background right over Watson's head is part of a 20th century circular red and white road sign. (00:34:18)