Origin and early years

Leo was a socially awkward S.H.I.E.L.D. tech specialist. But despite his awkwardness, he got along remarkably well with his research partner, Jemma Simmons. The two of them were stated to be similar to inseparable siblings. He was recruited by Agent Phil Coulson to be a part of his new team along with Simmons.[1]

After it was revealed that Hydra had been within S.H.I.E.L.D. since its formation, agent Ward, a member of Coulson's team, helped them infiltrate and secure the Hub. When Garrett, Ward's mentor, was exposed as a Hydra agent, Ward assisted him in escaping custody by killing Victoria Hand.[2] He then went on to springing Raina from prison, and raid the Fridge. However, as the hard drive he stole containing information on GH.325 required for Garrett was encrypted by Skye, Ward was forced to go undercover to get her to decrypt it.[3]

Jemma Simmons & Leo Fitz (Earth-199999)


For a time, his ploy worked, but as Agent Koenig was close to uncovering NSA surveillance of the Fridge, which would've exposed Ward's involvement in the raid, he was forced to kill Koenig and hide his body. Skye soon finds Koenig and realized Ward's true allegiance.[4]

Despite this reveal Skye left with Ward to not raise suspicion, having left a note telling the truth for the team to find. Coulson's team was able to track Ward and Garrett to Cuba, where Fitz and Simmons were captured. Fitz managed to use an EMP on Garrett's implants, bringing him close to death. In response Ward was ordered to kill the two scientists, which he attempted by jettisoning them from the Bus.[5] Despite being stuck at the bottom of the ocean, the two scientists were able to brainstorm a way to break out of the container and swim to the surface. Unfortunately, they only had enough oxygen for one person, so Fitz decides to sacrifice himself, confessing how he truly felt for Simmons. Nonetheless, Simmons drags Fitz all the way to the surface, where they are rescued by Nick Fury himself, having found them through their makeshift beacon. Simmons was put in a depressurization tank while Fitz was given to a medical team. Simmons then gave the Bus' location to Fury, who went to assist Coulson.[6]

Later, Simmons reunited with her teammates at the Playground, where they are introduced to Eric's identical twin, Billy.[6]

Rebuilding S.H.I.E.L.D.

Shortly after Coulson took up his responsibilities as the director of the newly reformed S.H.I.E.L.D, Simmons left the team. This caused Fitz, who was already brain damaged from his near-death experience, to become increasingly mentally unstable, even hallucinating that Simmons was still by his side. Due to his deteriorating mental state, Coulson believed Fitz would never be able to successfully develop cloaking technology for the Bus, and had Skye, May, and Trip recover a Quinjet with cloaking technology the military took from S.H.I.E.L.D. instead.[7]

Fitz was later tasked to develop a means to stop Carl Creel, a Hydra assassin who had the ability to absorb any substance into his body and transform the molecules of his body into that substance. However, due to the damage to his brain, Fitz struggled to convey his ideas to the people working for him, including the mechanic Alphonso "Mack" Mackenzie, leading to frequent outbursts of rage. With Mack's help, Fitz was able to point them to a device he envisioned before his brain damage. Although he and Mack began to bond over their work, Fitz was still mentally unstable as he continued to hallucinate Simmons' presence around the Playground.[8]

While Coulson led his team to retrieve Donnie Gill, Fitz and Mack stayed behind at the Playground. Fitz took this opportunity to investigate their "asset" in Vault D that was being kept secret from him, only to find it was none other than Ward. Fitz started to break in front of the man who almost killed him, so he cut off the oxygen to Ward's cell so he could do to him what had happened to Fitz during his brush with death. Fitz stopped torturing his prisoner when he told Ward everyone else was on the hunt for Donnie, and Ward warned them that Hydra would try and reactive Gill as a brainwashed agent. Later, Coulson reprimanded Fitz for what he did to Ward, and revealed to him that Simmons was working undercover as a scientist for Hydra.[9]

Although he had been bonding with Mack, Fitz continued to struggle with socializing with his fellow teammates. When an impostor posing as Agent May sabotaged the Bus with a computer virus, Fitz realized the plane was going to explode. As the rest of the team split up to try and repair the damage already done, Fitz and Hunter headed to the heart of the plane's computer systems to stop the virus. However, the damage to Fitz's motor skills made him incapable of manually restarting the systems, forcing him to instruct Hunter on how to do this. With Hunter's help, Fitz was able to stop the virus moments before the plane exploded. Later on, Hunter arrived on the plane with beers for himself, Fitz and Mack. Fitz reluctantly accepted the beer, noticed his hallucination of Simmons was no longer there, and, although he had no stories about an ex, told them about a girl who had rejected him.[10]

Marvel's Agents of S.H.I.E.L.D. Season 2 9 2

Running scans in the Kree City

After Simmon returned from her undercover mission, Fitz was mad at her for leaving, but, in the months that followed, they started to get along again. As Fitz's condition seemed to get better, they started to work together more and they aided the team in their search for the Kree City, but during this mission Skye went through Terrigenesis and the way they should handle her new-found powers opened a new rift between them.[11][12]

When their base was attacked by another S.H.I.E.L.D. faction led by Robert Gonzales, he asked Fitz to unlock the Nick Fury's Toolbox, which he believed contained information on superhumans that Fury had kept hidden. Although Fitz wouldn't help, Jemma told Gonzales she would try to unlock, much to Fitz's sadness. However, Jemma had noticed Fitz departed the Playground with the Toolbox, leaving her with a replica behind.[13][14]

Gonzales and Coulson later came to an understanding; Gonzales aided Coulson's team in infiltrating Hydra's Arctic base to rescue Enhanced prisoners in exchange for Coulson unlocking the Toolbox for him. Upon unlocking it, Coulson revealed that Fury was alive.[15]

After the Avengers defeated Ultron, Coulson reunified the two factions into one organization with Coulson as its rightful director, while Gonzales' became the S.H.I.E.L.D. emissary to the Inhuman leader, Jiaying (who was also Skye's birth mother). Despite his peaceful intentions, Jiaying betrayed Gonzales, smashing a Terrigen crystal containing Diviner metal and thus unleashing the mist that slowly petrified Gonzales. He pulled a handgun from his jacket and attempted to use it, but couldn't. Jiaying then took the gun from his hand and shot herself in the left shoulder twice, using it to the effect to make it look like S.H.I.E.L.D came for a fight.[16]

A war between S.H.I.E.L.D. and the Inhumans culminated and Jiaying's hatred for humankind led her to attack her own daughter when she sided with S.H.I.E.L.D., which led to Jiaying's husband, Calvin Zabo, turning against her and killing her.

Marvel's Agents of S.H.I.E.L.D. Season 2 21

Jiaying's actions would, however, have long lasting consequences, because her Terrigen Crystals (that Skye had knocked into the sea) would be dissolved at the bottom of the sea, leading to people carrying dormant Inhuman genes developing super-human abilities when injesting the fish affected.

After the War against the Inhumans, Simmons was asked by a nervous Fitz to have dinner with him, but she found herself teleported to an alien world after being swallowed by the Kree Monolith.[17][18]

After being separated from the rest of his friends when they were abducted by Enoch, Fitz was arrested by the U.S. military for his supposed involvement in the attempted assassination of General Glenn Talbot. He was taken to a high-security military facility, where he was kept and interrogated for six months. He was able to send a coded message to Lance Hunter, who arrived disguised as Fitz' lawyer and broke him out by blowing a hole in the interrogation room. They escaped and were able to track down Enoch, who revealed himself to be a sentient Chronicom who had been observing humanity for 30,000 years sent Fitz's friends to the year 2091 to fulfill a prophecy. Enoch took Fitz and Hunter to meet Robin Hinton, "the Seer" who had prophesied the Earth's impending destruction. Enoch then took Robin, her mother Polly, Fitz, and Hunter to the Lighthouse, a bunker build to withstand an earth-shattering cataclysm. Enoch told Fitz that there was a way for him to rejoin his friends in the future and cryogenically froze him in the pod that he then took on his spaceship to the orbit of Jupiter, where they would survive the Earth's destruction and wait for 74 years.[19]


Formerly, Fitz suffered from speech and motor skills impediments due to his brain damage. The brain damage also caused Fitz to experience hallucinations; during the time that Simmons was undercover with HYDRA, Fitz hallucinated that she was still there, offering him help in the lab, though these hallucinations subsided when she returned.

  • He is a Level 5 Agent.[20]
  • Fitz and Simmons graduated from the S.H.I.E.L.D. Academy in 2004.[21]
  • Fitz can speak Hebrew.[18]

Discover and Discuss


  1. Marvel's Agents of S.H.I.E.L.D. Season 1 1
  2. Marvel's Agents of S.H.I.E.L.D. Season 1 17
  3. Marvel's Agents of S.H.I.E.L.D. Season 1 18
  4. Marvel's Agents of S.H.I.E.L.D. Season 1 19
  5. Marvel's Agents of S.H.I.E.L.D. Season 1 21
  6. 6.0 6.1 Marvel's Agents of S.H.I.E.L.D. Season 1 22
  7. Marvel's Agents of S.H.I.E.L.D. Season 2 1
  8. Marvel's Agents of S.H.I.E.L.D. Season 2 2
  9. Marvel's Agents of S.H.I.E.L.D. Season 2 3
  10. Marvel's Agents of S.H.I.E.L.D. Season 2 4
  11. Marvel's Agents of S.H.I.E.L.D. Season 2 6
  12. Marvel's Agents of S.H.I.E.L.D. Season 2 12
  13. Marvel's Agents of S.H.I.E.L.D. Season 2 13
  14. Marvel's Agents of S.H.I.E.L.D. Season 2 16
  15. Marvel's Agents of S.H.I.E.L.D. Season 2 19
  16. Marvel's Agents of S.H.I.E.L.D. Season 2 20
  17. Marvel's Agents of S.H.I.E.L.D. Season 2 22
  18. 18.0 18.1 Marvel's Agents of S.H.I.E.L.D. Season 3 1
  19. Marvel's Agents of S.H.I.E.L.D. Season 5 5
  20. Marvel's Agents of S.H.I.E.L.D. Season 1 7
  21. Marvel's Agents of S.H.I.E.L.D. Season 1 12

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