Iain de Castecker as Leo Fitz on Marvel's Agents Of S.H.I.E.L.D.

Who he is: Leopold Fitz, a.k.a. Leo Fitz, a.k.a one-half of FitzSimmons

His power: No superpowers. Fitz is an agent of S.H.I.E.L.D., trained in hand-to-hand combat and weapons, but his speciality is engineering, designing high-tech gadgets and weaponry for his team.

His Story: Leo Fitz was recruited by Phil Coulson directly out of the S.H.I.E.L.D. academy, along with his best friend and partner, Jemma Simmons, and served the team well on Marvel’s Agents Of S.H.I.E.L.D. As shocked as anyone by the implosion of S.H.I.E.L.D. at the hands of Hydra agents during the events of Captain America: The Winter Soldier, Fitz suffered brain damage after Ward dropped him and Simmons into the ocean in a sealed medical pod, and there was only enough oxygen for one to escape. However, he slowly recovered his capabilities, and when Simmons was pulled through the Monolith’s portal to a distant planet, Fitz’s research allowed them to mount a rescue mission, with him traveling through the portal and rescuing her. However, after being kidnapped by Hydra, he was sent through a second time, resulting in the return to Earth of the original Inhuman, Hive, in the body of Grant Ward. Simmons and Fitz helped to execute the plan to defeat Hive and save Daisy Johnson from his control.

Most recently, Fitz unwittingly helped scientist John Radcliffe create Life Model Decoys and a virtual reality simulation that the conniving doctor then used to kidnap and replace most of the S.H.I.E.L.D. team, including Fitz. Which sucks for Leo, but not as much as the fact that he then got his consciousness uploaded to the Framework, the VR program that makes him think he’s living another life entirely. Needless to say, he’s feeling a little guilty about it at present.

Played by: Iain De Caestecker

Currently, Leo Fitz is: An agent of S.H.I.E.L.D., albeit captured and trapped in a simulated reality.

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Where will we see him next? In the fourth season of Marvel’s Agents Of S.H.I.E.L.D.