Supergirl #19

The cover of Supergirl #19 (May 1984) poses an irresistible question — "Who Stole Supergirl's Life?" — as two blonde women in matching blue-and-red Supergirl costumes face off dramatically against an urban rooftop backdrop, penciled by Eduardo Barreto and inked by Bob Oksner. The airborne Supergirl, red cape streaming behind her, swoops toward a second figure in civilian clothes over a Supergirl costume who looks up in shock and alarm. It's a wonderfully tense visual hook that captures the kind of identity-driven storytelling DC was doing so well in 1984.