Baker Street (S01E04)

Driven by her past, Charlie travels to London with Samy in tow, determined to finally meet her half-sister. While heading to Sherlock Holmes’ house, they cross paths with Tracy, a deeply disturbed young woman who pleads for their help. She insists her dead sister’s ghost has appeared to warn her that she’s in mortal danger. Can they unravel the mystery and stop Tracy from meeting the same tragic end that claimed her sister years ago?