|“|| I feed upon your fears.Your emotions.
Yes! My full power has returned! The Squadron Supreme destroyed their own planet.And now, Avengers, you will be responsible for destroying yours.
|~ Doctor Spectrum to Avengers as he's about to destroy the planet earth with his power prism|
Doctor Spectrum is an alien from a distant world where they where team of heroes similar to the Avengers called the Squadron Supreme. The people of their world feared their power and turned against them. As a final solution Hyperion destroys his home planet along with his team on it, escaping into space in his Citadel.
Despite Spectrum not appearing in the episode "Nighthawk" he and along with the other Squadron Supreme are mentioned to have survived the exploding planet as said by Nighthawk
Using the Reality Gem, Dr. Spectrum alters reality so the Avengers are all supervillains the Avengers Tower is headquarters of the Squadron as well as them being branded superheroes. Due to a spike in energy,Iron Man sees the real reality however Iron Man with him thinking that they were once a team of supervillains that were strong enough to fight the Squadron reunited in an attempt to defeat them until Captain shows them the real reality. However Spectrum has created a machine that will give him complete control over reality, and plans to alter history so the Avengers were never born. Captain is able to get a hold of the stone and revert reality back to normal. The Squadron leaves with Nighthawk activating charges placed at the base of Avengers tower. The Avengers manage to prevent the structure from falling onto New York in time for J.A.R.V.I.S. to activate the repair systems.
While the Avengers were on a search for the Squadron Supreme it was revealed that Spectrum was force to destroyed his planet due to in part by Hyperion, Nighthawk, and the Power Prism. The Power Prism soon later leaves Doctor Spectrum (Bill) and appears in front of Nighthawk talking to him about finding a new host and Nighthawk says that he no longer needs one thus transforming into energy being that ressembles a lot like the original Doctor Spectrum. It is later shown that Doctor Spectrum now known as Bill only, is recruited as a scientist by S.H.I.E.L.D. to help them through their space explorations.
- His name Bill is a reference to Bill Roberts the second person to adopt the Doctor Spectrum persona
- The original Doctor Spectrum is an homage as well as imitation of DC's Green Lantern
- Doctor Spectrum, despite being a villain by proxy he seemed to be aware of his actions in the episode Dark Avengers, notice: instead of having the Power Prism he has the reality gem.
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