Issue: #10
Answers from the past are sought as the Ultimates discover that the key to the clandestine alien infiltration of Earth may reside in a secret mission Captain America himself presided over in the darkest days of World War II. It's a mystery wrapped in an enigma as the Ultimates attempt to learn more about the greatest threat ever to face the planet!
First appearances: Herr Kleiser
Creators: Paul Mounts, Bryan Hitch, C. B. Cebulski, Mark Millar, Paul Neary, Chris Eliopoulos, Ralph Macchio
Characters: Hawkeye, Captain America, Iron Man, Thor, Nick Fury, Wasp, Black Widow, Dwight D. Eisenhower, Herr Kleiser