Captain America [Steve Rogers] (introduction, origin); Bucky [Bucky Barnes] (introduction); President Franklin D. Roosevelt; General Phillips (introduction); J. Arthur Grover [J. Edgar Hoover]; Agent X-13 [Cynthia Glass] (introduction); Professor Reinstein [Abraham Erskine] (introduction, dies); Heinz Kruger (introduction, dies)
Joe Rosen (pp 1-8, 26-34); John Costanza (pp 9-25)
Captain America [Steve Rogers]; Bucky [Bucky Barnes]; Baron Zemo [Heinrich Zemo]; Invaders; Human Torch [Jim Hammond]; Toro; Namor the Sub-Mariner; Spitfire; Union Jack [Brian Falsworth]; Winston Churchill; Major Rawlings; Colonel Farrow; Harry Truman; Spirit of '76 [William Naslund] (becomes Captain America II, dies); Patriot [Jeff Mace] (becomes Captain America III); Bucky II [Fred Davis]; All-Winners Squad; Miss America [Madeline Joyce]; Whizzer [Robert Frank]; Adam II; Pr Horton; John Fitzgerald Kennedy
Captain America and Bucky are killed by Baron Zemo. Hitler is killed by the Human Torch. Union Jack and Spitfire save Churchill. The Invaders learn of Captain America's death and leave Union Jack and Spitfire in England. President Truman introduces the new Captain America (Spirit of '76) and Bucky (Fred Davis) and adds Whizzer and Miss America to the team. After Japan surrenders, the team is renamed All-Winners Squad. After fighting Isbisa, they fight the android Adam II and his plot to kill and replace JFK. The replacement Captain America is killed and replaced by the Patriot.
Captain America [Steve Rogers]; Falcon [Sam Wilson]; Sharon Carter [Agent 13]; Redwing; Captain America [William Burnside] (1950's Cap, as "Steve Rogers", origin); Bucky [Jack Monroe] (origin); Red Skull [Albert Malik] (flashback); Electro (cameo flashback); The Man With No Face (cameo flashback)
Super Patriot [John Walker, becomes Captain America] (origin); Commission [Valerie Cooper; General Haywerth; Henry Peter Gyrich; Mr. Mathers]; Katy; Ethan Thurm; BUCkies [Lemar Hoskins; Jerry Johnson; Hector Lennox]; Freedom Force [Blob; Avalanche; Pyro]
Captain America [Bucky Barnes]; Matthew Fritchmann (on television); Black Widow [Natasha Romanoff]; A.I.M. agents; R.A.I.D. agents; Mr. Secretary; Tony Stark [Iron Man]; S.H.I.E.L.D.; Red Skull [Johann Schmidt; Aleksander Lukin]; Arnim Zola; Dr. Faustus; Molly (television reporter)