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Edwin C. Steen, aka Lifeline, is a medic and scientist for G.I. Joe. He is incredibly pedantic.


I need intel, not taxpayer dollars.
I need to know what I'm up against.

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When the head of Decepticon Astrotrain crashed on Earth, Lifeline was part of the Joe unit sent to study and retrieve it. Studying the head to ensure it wasn't dangerous, Lifeline detected a strange energy signature that was keeping the head alive, as well as causing the surrounding plants to grow rapidly. The Joes were then ambushed by V.E.N.O.M., who were there to steal the head. Lifeline tried to escape in a V.A.M.P., only to be forced off a cliff by Sly Rax. Lifeline awoke in M.A.S.K. HQ where, much to his displeasure, he was being treated by Julio Lopez. Lifeline told M.A.S.K. and the Joes that the energy he detected came from a techno-organism that could be used either for medical miracles or untold destruction. After Julio was injured in battle with Sly Rax, Lifeline told Matt Trakker that the only way to save his life would be through the use of the techno-organism from Astrotrain's head. Matt and Scarlett recovered it from the hands of Miles Mayhem, and Lifeline was able to complete a surgery that saved Julio's life. The Deathstone

Though he had some trouble understanding his alien physiology, Lifeline was still able to stabilize Doc Senior after he took some shrapnel protecting Grand Slam, revealing himself as a Dire Wraith in the process. He later spoke up to ask about the whereabouts of Doc's daughter. G.I. Joe vol. 5 #4 TFWikiFavicon.png


  • The "C" does not stand for "Charlemagne". Apparently.

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