Baron Zemo
Baron Zemo
Biographical information
Real name

Helmut Zemo


Baron Zemo, Citizen V

Physical description


Hair color


Eye color


Personal information



Heinrich Zemo (father)


Swords, Laser Blasters

Chronological and political information



Terrorist Leader of the Masters of Evil/Thunderbolts


Hydra, Masters of Evil/Thunderbolts

First appearance

Saving Captain Rogers

Voiced by

David Kaye

Baron Helmut Zemo is a German nobleman and leader of Hydra and Masters of Evil/Thunderbolts, and is a major antagonist in Season 3, Ultron Revolution and a minor antagonist in season 4, Secret Wars.


Baron Helmut Zemo was a nobleman and scientist whose father was Baron Heinrich Zemo, one of the founders of Hydra. He sought to carry his father's legacy and recreate the super-soldier serum and create an army powered by the serum. Zemo attempted to formulate his own version of the serum, but it was imperfect, leading his test subjects to turn into hulking abominations. Thus, Helmut resolved to find his father's perfect serum to achieve his goals.

To achieve this goal, the now-elderly Zemo placed his father's old nemesis Captain America under a special state of hypnosis that forced him to relive his final days with Bucky during the war against Hydra. Zemo followed Captain America to Castle Zemo in order to find his father's version of the super soldier serum, but was briefly interrupted by Iron Man and Black Widow. Injecting the two Hydra soldiers flanking him with his crude serum, he followed Captain America to his father's laboratory, where he injected himself with the super soldier serum and rejuvenating himself, by giving him a younger more powerful form. He took the other remaining vial of the serum for his own use. Donning a hood reminiscent yet different from his father's, Zemo fought the other two Avengers, easily able to handle them due to his enhancements. However, Captain America broke out of Zemo's mental control thanks to Bucky materializing himself as Cap's conscience telling him that the events playing out in his mind weren't the ones that actually occurred. Captain America joined the fight and was evenly matched with Zemo until the baron fired his pistols at the walls of Castle Zemo, causing it and the cliffside they fought on to crumble. Zemo leapt after the serum that fell out of his suit, with Captain America in hot pursuit. As both super-soldiers fell, Cap quickly grabbed Zemo's hand, but Zemo refused his help to pull him up, stating he wanted to maintain his father's legacy, forcing Cap to release his grip. Zemo fell into the rocky waters, but Iron Man's scans showed that he had disappeared.

Zemo later resurfaces as the superhero Citizen V, helping the Avengers defeat Growing Man. Originally, his plan was teaming up with the Masters of Evil, and disguising them as a new superhero team called the Thunderbolts. However, when their secret was exposed, the Avengers and Masters were left to die in a collapsing warehouse while Zemo as Citizen V gained public sympathy from their deaths. However, the Avengers and the Thunderbolts, now genuinely reformed, exposed his true identity to the city, foiling his plan. Initiating a backup plan, Zemo unleashed a supercharged Ulysses Klaw against them, while he escaped.

After obtaining leftover time travel technology from Kang the Conqueror, Zemo constructed a time portal to make contact his father, Heinrich Zemo, the original Baron Zemo. He eventually was able to bring his father from the 40s during World War II to the present day, just as Captain America, Falcon and Black Widow arrived. Heinrich resolves to strand the three Avengers in his own time period, forcing them into the portal. During the fight between the Avengers and the Zemos, Heinrich started to see Helmut as a disappointment enough to use the time machine to bring forward a Zemo from the year 2099. After Helmut got trapped under some debris, his own father declined to help him. After being freed from the debris from Captain America, Helmut worked with Captain America to send Heinrich back to 1943 which also erases Zemo 2099's existence. As Helmut had cooperated with Captain America, he won't be sent to the Vault. Baron Zemo next appears in Avengers: Secret Wars. Zemo has a confrontation with Black Panther and Ant-Man while obtaining a Wakandan relic hidden away by T'Chaka and Heinrich. Despite being empowered by the hidden relic (to the point of insanity), he is defeated by the two members of the New Avengers.

Powers & Abilities

  • Medically Enhanced Attributes: Helmut Zemo started out as an old man, due to having aged since World War II, but his father's version of the super soldier serum gave him super-enhanced physical and biological parameters on par with Captain America.
    • Enhanced Strength: His raw muscle power & physical strength strength is considerable able to fend off Black Widow in direct combat.
    • Enhanced Agility: He is highly agile and evasive, able to effectively dodge and maneuver against multiple enemies with impressive acrobatics.
    • Enhanced Endurance: Zemo is highly resilient, able to take a direct hit from Iron Man's tasers and fight on unhindered, likely showing a considerably advanced stamina.
    • Accelerated Healing: The rapid healing capacities Zemo gained are quite remarkable, as it was able to rejuvenate him to his physical prime in both health and appearance, likewise slowing his aging process, to border immortality. It also allows him to heal much faster and efficiently than a peak-human specimen & gave him an immunity to illness.
  • Swordsmanship: He is a remarkable swordsman, able to use a blade with lethal accuracy and strength.
  • Genius-Level Intelligence: Baron Helmut Zemo has claimed to be a genius. He was capable of creating a super soldier serum, which was capable of turning human beings into hulk sized abominations with superhuman physical attributes. He is also a master of ancient hypnosis techniques, which are even able to bypass Captain America's iron willpower.
  • Military Protocols: As a Baron, he is a highly skilled military tactician. He also had an extensive knowledge of Captain America's fighting styles & tactics. He is able to lead his Militia back in World War II & the modern world(But from behind the scenes). Under his leadership, he even managed to transform the incompetent Masters of Evil into warriors, on parallel levels with the Avengers.
  • Marksmanship: He has shown a remarkable proficiency with his signature fire arms.
  • Hand-to-Hand Combat: As a Baron, he has advanced training in various martial arts. He displays his advanced combat skills while fighting Iron Man, Black Widow and Captain America. He is able to overpower the Thunderbolts and the Avengers all on his own, solely based on skill & gadgetry.


  • Vibranium Manipulation: He gained the vibranium particles of Klaue to gain control over the vibranium particles itself.
    • Force-Field Generation: he was able to create a force-field shielding him from the combined of the Avengers & the Thunderbolts.
    • Vibrational Energy Generation: he is able to generate vibrational energy constructs. He can even power his sword with vibrational energy to enhance the potency of his power.


Season 3: Ultron Revolution

."Saving Captain Rogers" (First Appearance)

."Under Siege"

."The Thunderbolts"

."Thunderbolts Revealed"

."The House of Zemo"

Season 4: Secret Wars



  • Zemo was a member, and the leader, of the super villain team, the Masters of Evil. Both Heinrich and Helmut Zemo led several iterations of the Masters in comics and other media.
  • Zemo's role possibly reflects his role in Captain America: Civil War, which the third season adapts to tie-in. However, his Civil War counterpart was confirmed to not be wearing the purple hood in his first appearance. Unlike Zemo in the series, his movie counterpart is not a member of Hydra.
  • In the comics, Zemo's father Heinrich developed a serum called Adhesive X, an extreme form of superglue (as noted by Black Widow) which after accidental exposure became the reason Heinrich never took off his hood. Later on in his life, Helmut was exposed to the serum as well, disfiguring him, though it doesn't appear to be the in-show reason for why they never showed his full face after his reaging and empowerment.