Ep. 18: The trio heads to Sverdlovsk-51 while others travel to Ekaterinburg
Aired on February 11, 2006

18
David, Lewis, and Kai investigate a defected Delta-67 scientist, leading them to the abandoned nuclear facility known as Sverdlovsk-51. Meanwhile, Hagi, Saya, and Riku arrive in Tyumen and board a train to continue their journey toward Ekaterinburg.
Episodes
- Ep. 14 · The Miyagusuku family returns to Okinawa for a final farewell with friends
- Ep. 15 · Journalist Akihiro Okamura seeks answers regarding a chiropteran encounter near the Laos border
- Ep. 16 · David and Saya travel to Vladivostok to board the Trans-Siberian Express toward Ekaterinburg.
- Ep. 17 · Remembering the Promise: Hagi and Saya Rescue Riku from Chiropterans
- Ep. 18 · The trio heads to Sverdlovsk-51 while others travel to Ekaterinburg
- Ep. 19 · Saya, Riku, and Hagi reach Ekaterinburg to meet David while Riku becomes sick.
- Ep. 20 · David and companions reach Red Shield while Kai reads Joel's diary about Saya
- Ep. 21 · Okamura and Mao investigate wine clues while Saya and Hagi flee artificial chiropterans
- Ep. 22 · Saya explores the ruins of Joel's mansion, known as the Zoo, and remembers meeting Hagi.