DC Comics introduced Showcase in the mid-1950s to test out potential new features and see if there was enough interest to launch them in their own book. Starting with Flash’s debut in #4 (cover by Carmine Infantino)—
— it ran an unbroken string of successes until #41 (cover by Lee Elias), when it showcased Tommy Tomorrow, a veteran backup feature, failed to make the jump to headliner.
None of comics’ other tryout books have matched that record. Covers, of course, were a big part of selling comics in the Silver Age (I think they’re way less important now) so here are a few Showcase covers. By Murphy Anderson —
Joe Orlando.
Mike Sekowsky.
And Neal Adams.
Of that quartet, Manhunter 2070 (a year that seems a lot less futuristic now that it did when the issue came out) is the only one that didn’t make it to series.
All rights to images remain with current holders.