The Return of Captain Invincible (1983)

In WWII, Captain Invincible used his superpowers against the Nazis and was hailed as a hero. But when he was accused of treason, he retired to Australia in disgrace. Cut to the present, when a US super secret super weapon is stolen and he's asked to come back to the States in order to help stop evil and restore his sterling reputation. Unfortunately, Captain Invincible is a drunk now...