In "The Adventure of the Greek Interpreter", Watson states: "I had never heard him refer to his relations, and hardly ever to his early life."

"The Adventure of the Greek Interpreter" (Mycroft appears for the first time)

Mycroft resembles Sherlock, but is described in "The Greek Interpreter" as being "a much larger and stouter man".

Mycroft appears as a major character in "The Adventure of the Greek Interpreter" and in this story.

"The Adventure of the Greek Interpreter"

That was at the time of the Affair, as you called it, of the Greek Interpreter.

The Greek Interpreter - 21 October 1968 (missing episode)

The Greek Interpreter (1922)

In "The Adventure of the Greek Interpreter", Holmes claims that his great-uncle was Vernet, the French artist.

I had some vague recollection of an explanation at the time of the Adventure of the Greek Interpreter.