Mr. Hyde

Calvin "Cal" Johnson is a brilliant, unstable scientist who spends years searching for the daughter he lost, only to learn she's grown up to become Daisy Johnson. After killing his wife, Jiaying, once he sees what she has truly become, his memory is wiped and he begins again with no knowledge of who he had been. Read more →

First turns up in Agents of S.H.I.E.L.D. (Season 2).