Startling Comics #50

When Terry and Professor Ezekiel Ransome follow an archaeological trail deep into the jungle with the jungle maiden Tygra, they uncover a hidden civilization—descendants of an ancient Roman expedition trapped in a forgotten valley for two thousand years. Now ruled by the ruthless Nerea Caesar, who dreams of conquering the outer world with a massive imperial army, the trio must navigate a deadly court of gladiatorial trials and Roman politics to survive. Only Tygra's cunning and combat skills can hope to stop an empire obsessed with conquest before it breaches the barrier to the modern world.

Lance Lewis and a fellow operative infiltrate the Amoeba-Men's lunar base disguised as a disabled reconnaissance ship, hoping to get close to their all-powerful leader Arbu—whose command structure mirrors an ant colony, with every Saturnian bound to obey his orders. Using smuggled radio sets hidden in their mouths, they broadcast voices of Earth's National Defense Council from their prison cell to create confusion among the invaders. With Earth's scattered fleet regrouping and outnumbered, Lance's plan hinges on exploiting the enemy's fatal dependence on centralized leadership before Arbu's torture chambers become operational.