A key issue noted for First appearance of Ultivac and First appearance of June Robbins. Showcase #7 was published by DC Comics on April 1, 1957, as part of a series that began in 1956. Dave Wood writes, and art comes from Jack Kirby, Marvin Stein and Roz Kirby. This 36-page issue features Rocky Davis, Ace Morgan, Red Ryan, Prof Haley and June Robbins, among 10 characters cataloged on VerseDB.