Invincible: Out of this World — Image
Issue: #9
Allen the Alien returns to Earth as directed by the Coalition of Planets - he's come to gather information from Mark about his father - the Viltrumite Traitor. Meanwhile, the Viltrumites have come to Earth to check up on Mark's progress as the reluctant Viltrumite Agent of Earth.
Creators: Robert Kirkman, Rus Wooton, Ryan Ottley, Bill Crabtree
Characters: General Kregg, Invincible, Oliver Grayson, Omni-Man, Fightmaster, Professor Varner, Drop Kick, Rex-Splode, Titan, Atom Eve, Allen, Mister Liu, Tether Tyrant, Cecil Stedman, Robot, Octoboss, D.A. Sinclair, William Clockwell, Magmaniac, Dupli-Kate