Comes from the episode 4-21-14, with Ken Burns appearing.
HYDRA is an evil organization in the Marvel Universe, typically set against Captain America; they’re a rogue Nazi sub-group, that were even more evil than Hitler, and much more vicious in their ways. Hail Hydra is a quote from the new movie, Captain America: The Winter Soldier. Beautiful movie! And best yet, it sticks to cannon! If you have the chance, I suggest watching it, if you haven’t already!