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.
...I knew he killed Lucy!
!عرفت أنه من قتل لوسي...
Er hätte genauso gut
Lucy selbst töten können.
¡Sabía que él había matado a Lucy!
Je savais qu’il avait tué Lucy !
Eu sabia que ele
tinha matado a Lucy!
Он довёл мою бедную Люси до смерти!