ALLIED, AXIS AND ALIEN POWERS COLLIDE! CAPTAIN AMERICA leads BUCKY BARNES and the rest of the HOWLING COMMANDOS behind enemy lines in order to free one of their own — but no-one is prepared for the horror they discover at HYDRA'S most top-secret base! Meanwhile, has RED SKULL managed to find a way to harness the destructive might of the XENOMORPHS, or has he merely added to the carnage and chaos of the warfront? Either way, Captain America and his allies are about to face their biggest fight yet — that is, unless an unexpected “alien” ally sees fit to intervene!