Ep. 4: Yuuji recovers while virus outbreak escalates and he realizes Ai's importance
Aired on November 3, 2001

Yuuji slowly recovers from his previous injuries as the virus outbreak grows out of control. In the face of growing danger, Yuuji begins to realize how much Ai means to him. He races to the aid of Ai as he leads the remaining armed forces against the new mutations.
Episodes
- Ep. 1 · Yuuji faces duty while meeting Ai, the NOA's new weapon against the M34 virus.
- Ep. 2 · Yuuji hospitalized while NOA team fights and Ai faces M34 virus horrors
- Ep. 3 · NOA soldiers return to base but face a new M34 strain infection
- Ep. 4 · Yuuji recovers while virus outbreak escalates and he realizes Ai's importance