Real Name: Helmut Zemo
Occupation: Scientist
Legal Status: Citizen of Germany with no criminal record
Identity: Baron Zemo does not use a dual identity.
Other aliases: Citizen V, Phoenix I
Place of Birth: Leipzig, Germany
Marital Status: Single
Known Relatives: Heinrich (father, deceased), Hilda (mother, deceased)
Group Affiliation: Former partner of Primus, former ally of Mother Superior and the Red Skull
Base of Operations: Castle Zemo, Sierra Madre Oriental Mountains, Mexico
First Appearance: (as Phoenix I) CAPTAIN AMERICA #168, (as Zemo) CAPTAIN AMERICA #276

History: Helmut Zemo is the son of Baron Heinrich Zemo, the master Nazi scientist and enemy of Captain America. During World War Two, the elder Zemo made many scientific discoveries for the Third Reich, among which was Adhesive X, a powerful bonding agent. In battle with Captain America, Zemo was doused with Adhesive X, permanently affixing the mask Zemo wore to conceal his identity to his face. Zemo's only son, Helmut, believed this led to his father's insanity. When Captain America was revived from his decades-long suspended animation, the elder Zemo, estranged from his wife and son, came out of hiding in South America to battle him. The elder Zemo eventually died in battle with Captain America, when the former accidentally triggered a rockslide with his disintegrator gun and was buried by it.

Eventually learning the circumstances of his father's demise, young Helmut Zemo blamed Captain America and decided to follow in his father's footsteps and avenge him. Zemo recreated many of his father's devices and formulae, including Adhesive X. Calling himself the Phoenix, Zemo captured Captain America and his then-partner the Falcon and chained them above a boiling cauldron of Adhesive X. Escaping, Captain America grappled with the young Zemo and accidentally caused him to topple into the vat of liquid. Captain America left, believing Zemo dead.

Helmut Zemo had, in fact, escaped through a secret pipe at the bottom of the cauldron. The passage through the boiling liquid left its mark, however, and Zemo's face was severely scarred. Zemo kept out of sight for a period of time, building a retreat for himself in Mexico, recreating more of his father's inventions, and plotting revenge against Captain America. Allying himself with Primus, the shape changing mutate created by geneticist Arnim Zola. Zemo finally launched his first major campaign against Captain America, using Captain America's childhood friend Arnold Roth as his pawn. Captain America managed to escape, however.

Zemo's second attack on Captain America was launched under the auspice of the Nazi mastermind, the Red Skull, and his daughter, Mother Superior. After Zemo underwent tutelage at the side of Mother Superior, the Skull provided Zemo with the opportunity to defeat Captain America by making him relive his greatest tragedy, the death of his young ally Bucky (a death that occurred due to the machinations of Zemo's father). Captain America managed to survive the ordeal. Later, hostilities erupted between Zemo and Mother Superior over who would become the Red Skulls heir. Zemo lost the fight, falling prey to Mother Superior's mental blasts.

Recently Zemo took the name Citizen V and put to gether a rag tag team of super villans to pose as a superhero team. They call themselves the Thunderbolts.

Height: 5 ft. 10 in.
Weight: 180 lbs
Eyes: Blue
Hair: Blond (what is left of it)
Unusual features: Zemo's face is severely disfigured, having the appearance of melted wax.

Strength Level: Baron Zemo possesses the normal human strength of a man of his age, height, and build who engages in moderate exercise.

Known Superhuman Powers: None.

Abilities: Baron Zemo is highly intelligent, although not a scientific genius like his father. He is very capable of carrying out the experiments devised by his father; although it is unlikely he will make any significant scientific breakthroughs of his own. The depth of his hatred for Captain America, coupled with his great wealth, makes him a formidable enemy.