Ep. 4: Yuuji pulih saat wabah virus meningkat dan ia menyadari pentingnya Ai
Tayang pada 3 November 2001

Yuuji slowly recovers from his injuries from before, as the virus outbreak grows out of control. In the face of growing danger, Yuuji begins to realize how much Ai means to him. Yuuji races to the aid of Ai as he leads the remaining armed forces against the new mutations. (Source: TVDB)
Episode
- Ep. 1 · Yuuji menghadapi tugasnya sambil bertemu Ai, senjata baru NOA melawan virus M34.
- Ep. 2 · Yuuji dirawat di rumah sakit saat tim NOA bertempur dan Ai menghadapi horor virus M34
- Ep. 3 · Tentara NOA kembali ke pangkalan namun menghadapi infeksi strain M34 baru
- Ep. 4 · Yuuji pulih saat wabah virus meningkat dan ia menyadari pentingnya Ai