Ep. 4: Tony reflects on past captivity while Wolverine helps him fight a symbiotic threat and face Yinsen in the Dio suit.
Aired on October 22, 2010

4
Tony recalls events from five years ago, when terrorists led by Righella held him captive alongside Ho Yinsen after a test of his new Screamer jet. Yinsen demonstrated the error of his ways and assisted in constructing the prototype Iron Man suit before sacrificing himself to enable Tony’s escape. Concurrently, a vengeful Kawashima merges symbiotically with Taurus, attempting to eliminate Tony. Wolverine collaborates with Iron Man to destroy Taurus and rescue Kawashima. The conflict culminates with Iron Man confronting the Dio suit, which is piloted by Yinsen himself. This summary covers Tony’s memories of his past captivity, the joint effort to defeat Taurus, and the final confrontation with the Dio suit.
Episodes
- Ep. 1 · Tony Stark tests the Dio armor in Japan while facing external control and a Zodiac warrior.
- Ep. 2 · Tony faces smuggling charges involving stolen plutonium while battling Cancer.
- Ep. 3 · Iron Man battles the Zodiac robot Aries while uncovering Professor Michelinie's secret involvement in the Tesla Project.
- Ep. 4 · Tony reflects on past captivity while Wolverine helps him fight a symbiotic threat and face Yinsen in the Dio suit.
- Ep. 5 · Tony investigates a blue fluid infection linked to his station while rescuing compromised JSDF satellites
- Ep. 6 · Zodiac virus causes Arc Station robots to malfunction while Iron Man battles the digital threat
- Ep. 7 · Ramon Zero rescues Tony from Cancer robots before his abduction by Zodiac operatives.
- Ep. 8 · Tony protects Aki from Zodiac as Virgo attacks and erases her memory