Appleseed XIII - Season 1 - Eps 8: The Mares of Diomedes
Deunan is assigned to provide security to a Poseidon ambassador of goodwill aboard a submarine. But things go awry when the submarine malfunctions and other passengers begin to die mysteriously.
About Appleseed XIII

Title: Appleseed XIII
First Air Date: 2011-07-06
Last Air Date: 2012-07-09
Status: Ended
Rating: 5.7/10 (from 11 votes)
Language: JA
Seasons: 2
Total Episodes: 13
Network: Unknown
Genres: Animation, Sci-Fi & Fantasy
Production Companies: Production I.G, DandeLion Animation Studio
Synopsis
Following World War V, a global-scale conflict fought with non-nuclear weapons that almost halved the earth's population, the city-nation of Olympus stands as a beacon of hope in a world of chaos. The utopian metropolis is governed by Gaia, a vast artificial intelligence, and administered by genetically engineered humanoids known as bioroids. Although Olympus seems like a peaceful city on the surface, racial (human vs. bioroids vs. cyborgs), religious, and political conflicts lurk underneath -threatening to overturn the delicately balanced peace of this so-called utopia.
Cast

Maaya Sakamoto
Deunan Knute (voice)

Koichi Yamadera
Briareos (voice)

Mikako Takahashi
Hitomi (voice)

Sakiko Tamagawa
Athena (voice)

Naomi Shindo
Dia (voice)

Ami Koshimizu
Gina (voice)

Hiro Shimono
Yoshitsune (voice)

Jouji Nakata
Mags (voice)

Kanji Suzumori
Reese (voice)

Kenjiro Tsuda
Greg (voice)