Hydra

Hydra is a fictional criminal organization featured in comic books published by Marvel Comics. They first appeared in Strange Tales, Volume 1 #135 in August, 1965. HYDRA is part of the mainstream Marvel Universe and are most commonly associated with stories involving the S.H.I.E.L.D. super-spy organization.

In television, Hydra made their small-screen debut in 1983 in the "Enter: She-Hulk" episode of the Incredible Hulk animated television series. In that episode, the Supreme Hydra marshaled his forces to take control of Los Angeles. The appeared on the cartoon series X-Men: Evolution in 2011, in the eleventh episode of season three, "X23". They also appeared in the "Iron Man is Born" episode of Avengers: Earth's Mightiest Heroes, which was the first of four solo-adventure that preceded the regular series.

HYDRA has also played a major role in the Marvel Cinematic Universe. They were key antagonists in the 2011 feature film Captain America: The First Avenger and also played a major role in the 2014 sequel, Captain America: The Winter Soldier. Following the events of the film, HYDRA also appeared in the final quarter season of Agents of S.H.I.E.L.D. on ABC.

Agents of S.H.I.E.L.D.

 * Grant Ward
 * Jasper Sitwell
 * John Garrett
 * Kaminsky