Ep. 139: Investigation into the Russian Dolls Murder Case File 1
Aired on July 10, 2000

139
Following the death of a renowned author, his estate is to be split among five heirs. Takarada summons Hajime, Saki, and Miyuki to the Russian Mansion in Hokkaido. The group discovers five Russian dolls within the residence. This event initiates the investigation into the Russian Dolls Murder Case File 1, as the successors gather to claim their inheritance under mysterious circumstances.
Episodes
- Ep. 135 · The fourth case file details the killer's revelation regarding the professor and three victims.
- Ep. 136 · Superintendent Akechi's Splendid Reasoning in Las Vegas File 1
- Ep. 137 · Superintendent Akechi's Brilliant Deduction in the Las Vegas Case Part Two
- Ep. 138 · Miyuki Nanase Faces Murder Suspicions After an Amusement Park Incident
- Ep. 139 · Investigation into the Russian Dolls Murder Case File 1
- Ep. 140 · Investigation into the Second Russian Dolls Murder Case File
- Ep. 141 · The Third Russian Dolls Murder Case Investigation
- Ep. 142 · The fourth installment of the Russian Dolls Murder Case File
- Ep. 143 · The True Identity of the Conductor Is Exposed in the Fifth Russian Dolls Murder Case