John Erwin. Actor: He-Man in Das Geheimnis des Zauberschwertes. John Erwin is an American actor from Cambridge, Massachusetts. He is primarily known for voice roles in animation. He voiced the arrogant and selfish adolescent Reggie Mantle in the animated series "The Archie Show" (1968-1969). He returned to the role in a number of the series' spin-offs until 1977. He voiced the primary hero Prince Adam/He-Man and the secondary villain Beast...