“First Encounter!”
THUNDER Agents discover brilliant inventor Professor Jennings has been murdered and his lab ransacked by Warlord. They find some equipment that has not been taken and bring it to Thunder officials. While discovering the abilities of some of the equipment, they determine they need to come up with three specially trained agents - the best of the best.
“Menace of the Iron Fog”
Leonard Brown is given a powerbelt that gives him great strength but only lasts a short while before he loses all energy. He takes on Warlord's armored minions but the fight goes on too long and he is captured and brought before Warlord's lieutenant Iron Maiden.
“T.H.U.N.D.E.R. Agent NoMan”
T.H.U.N.D.E.R. scientists transfer the aging Doctor Dunn's mind into one of a group of android bodies. Not only is he very strong now but he is also given a cloak of invisibility. He can also transfer his mind to a spare android. He foils one of Warlord's agents, Demo, in his attempt to use his Sub-Men to steal valuable chemical elements from a factory, but Demo vows to return.
“The Enemy Within”
Janus is secretly an agent for Warlord while being successfully added to the ranks of T.H.U.N.D.E.R., and has been outfitted with an invention that gives him substantial mental powers. When wearing his new helmet, Janus, aka Menthor, wants to aid T.H.U.N.D.E.R. instead of destroy it as ordered by Warlord. After he saves the headquarters from destruction, Janus removes his helmet and is back as Warlord's agent, having forgotten everything he did while he wore it.
