Ghost in the Shell: Stand Alone Complex (2002)

S1E16 SA: Chinks in the Armour of the Heart; Ag2O

Batou takes on an undercover mission at a military facility to keep an eye on Zaitsev, a former Olympic silver medalist he once admired. Unfortunately, Zaitsev is now being investigated for espionage. Batou manages to form a quick friendship with him, a rare occurrence for the usually reserved operative. However, when Batou uncovers the unsettling reality about his idol, he finds himself facing a tough choice that could challenge his loyalties and beliefs.