Felix Blake is a recurring character in the Marvel Cinematic Universe. He appeared as a supporting protagonist in the short film Marvel One-Shot: Item 47. He later returned in the TV series Marvel's Agents of S.H.I.E.L.D. as a supporting protagonist in Season 1 and a supporting antagonist in Season 3.
He is a former S.H.I.E.L.D. agent who later founded the Watchdogs to hunt down and kill every Inhuman in the world following the Terrigen outbreak.