Searching for the true killer of Count Drebber, Sherlock and John set a trap for the culprit using a wedding ring found at the murder scene as bait. After a struggle in which the ring is lost, Sherlock is able to deduce who the real killer is.
What are you talking about, John?
The murder is all but solved at this point.
.ما الذي تتحدث عنه يا جون؟ لقد حلّت الجريمة سلفا
Was sagen Sie denn da, John?
¿De qué hablas, John?
Que racontes-tu, John ?
Do que está falando, John?
Ты чего это, Джон?