Marvel Cinematic Universe Wiki

Fitz in Agents of S.H.I.E.L.D.'s "The End is at Hand".

Doctor and former Agent Leopold "Leo" Fitz, PhD is a fictional character in the Marvel Cinematic Universe. He is played by Iain De Caestecker.

Fitz is or was an engineer at S.H.I.E.L.D., who became a member of Phil Coulson's personal team after the Battle of New York, and became one of the founding members of the second incarnation when the Hydra uprising in 2014 caused S.H.I.E.L.D. to be shut down due to Hydra working from the inside since its formation in 1949.

He became a colleague of biologist Jemma Simmons, becoming known as FitzSimmons. At first they were close friends, but neither of them were aware that there was more than that between them. Simmons and Fitz have both had to face personal struggles which had prevented them from being able to admit and fully explore their potential romance, but managed to make it work.

When Coulson's team was sent into the future of a broken Earth, without Fitz, he had to go into cryogenic suspension to reach the time they had been sent to in 2091. While there, they became engaged and when they made it back to the present, they got married. An unexpected "hitchhiker" in Deke Shaw came along, who was revealed to be their grandson. Fitz, however, was killed by debris in Chicago in the destruction Glenn Talbot caused, but Simmons had hope that they could locate the Fitz that was still in stasis, as the Earth had been saved and the time loop had been broken.


Total appearances: 121.


Total mentions: 9.


  • Fitz was conceived as being cockier, but was changed to being the unsure scientist that he began as onscreen, due to the casting of Iain De Caestecker.