Captain America [John Walker]; Bucky [Lemar Hoskins]; Professor Power; Secret Empire (flashback); Defenders [Moondragon; Valkyrie; Beast; Angel; Iceman] (flashback); SHIELD (flashback); Serpent Society [Sidewinder; Puff Adder; Fer-De-Lance; Black Racer; Copperhead]; Captain [Steve Rogers]; Falcon [Sam Wilson]; D-Man [Dennis Dunphy]; Nomad [Jack Monroe]; Mercatur; Levi
Synopsis:
The new Cap and Bucky are after Professor Power, while the Captain and his friends have to watch how Sidewinder springs the four snake-themed villains from jail.