Complex sentence: She is engaged to Tom (Ed Birch), who looks and dresses quite a bit like Sherlock; by "His Last Vow" the engagement has been broken off-Sherlock observes she is not wearing her ring.
Split into simpler sentences: She is engaged to Tom (Ed Birch), who looks and dresses quite a bit like Sherlock. By "His Last Vow" the engagement has been broken off-Sherlock observes she is not wearing her ring.