Marvel Cinematic Universe Wiki

We advise caution when dealing with any recently-released media involving multiversal subjects. Please do not make assumptions regarding confusing wording, other sites' speculation, and people's headcanon around the internet. Remember, only this site's policies fully apply in this site.


Marvel Cinematic Universe Wiki
Marvel Cinematic Universe Wiki

"Helius. Yeah, that was an early attempt at an ion fusion reactor."
Jemma Simmons[src]

Helius was an ion fusion reactor developed by S.H.I.E.L.D. in the 1950s for the Project Helius at Area 51.


S.H.I.E.L.D. Project

"Now, an ion fusion reactor is one of rocket science's holy grails. Think of it – it could power a space station in perpetuity."
Pascal Vega[src]

Project Helius was started by S.H.I.E.L.D. in the 1950s as an attempt to create an ion fusion reactor. The project was held at Area 51, and headed by Pascal Vega. However, Helius was placed in storage, as S.H.I.E.L.D. believed nothing on Earth was powerful enough to start the fusion reactor.[1]

Alternate Universes

Used by the Chronicoms

"You think Helius could be powered up the same way?"
"A Chronicom that's willing to die plus an ion fusion reactor will equal a bomb with a blast radius for miles. If that thing goes off, it could take out..."
"The entire brain trust of S.H.I.E.L.D."
Alphonso Mackenzie and Deke Shaw[src]

In 2019, S.H.I.E.L.D. from the prime timeline followed the Chronicoms and time traveled to an alternate 1955. In this timeline, Gerald Sharpe was scheduled to arrive at Area 51 in order to inspect Project Helius, but he was kidnapped by S.H.I.E.L.D., and a Life-Model Decoy of Phil Coulson went instead, pretending to be him. He was accompanied by Jemma Simmons, pretending to be Peggy Carter. Believing one of the scientists to be replaced by a Chronicom Hunter set on activating the Helius weapon, Coulson and Simmons began attempting to elicit emotional responses from everybody on the base.

Helius is activated

Simmons was eventually found by Daniel Sousa, who ordered her arrest, as well as Coulson's. Daisy Johnson arrived, pretending to be a CIA agent, and had Sousa take her to Simmons and Coulson, and a Chronicom Hunter began to activate Helius, despite attempts by Melinda May and Yo-Yo Rodriguez to stop her. Coulson locked Sousa in a cell and left the building and came across Vega, who explained that the device had been activated and could explode. Coulson ordered Vega to evacuate the scientists, and May and Rodriguez attempted to fight the Chronicom Hunter. While Chronicom Hunters nearly killed Rodriguez and Sousa, Simmons and Johnson managed to activate an electromagnetic pulse that shut down Project Helius, Coulson, and the Chronicom Hunters.[1]