2. The Dying Detective

When Victor Savage begins using opium and behaving strangely, his wife consults Holmes. Victor dies, and Holmes suspects his cousin, knowledgeable in rare diseases.

3. The Golden Pince-Nez

Holmes and Mycroft investigate the murder of a professor's assistant who died clutching a woman's pince-nez.

4. The Red Circle

Mrs. Hudson asks Holmes to help her friend with a lodger who insists on nobody entering his room, and his secret past is uncovered.

5. The Mazarin Stone

Mycroft investigates when the Mazarin Stone is stolen from a museum, and Watson deals with the promise of a large inheritance if a third person with the surname of Garrideb can be found.

6. The Cardboard Box

When Susan Cushing is sent two severed ears, Holmes connects the case with her missing sister.