A key issue noted for First appearance of Shapesmith and First appearance of Isotope. Invincible #18 was published by Image Comics on October 1, 2004, as part of a series that began in 2003. Benito J. Cereno and Robert Kirkman write, and art comes from Bill Crabtree, Charles Herring and Franchesco! This 36-page issue features Invincible, Atom Eve, Cecil Stedman, William Clockwell and Shapesmith, among 12 characters cataloged on VerseDB.