Superman's Pal, Jimmy Olsen #75

This March 1964 issue of Superman's Pal, Jimmy Olsen delivers a charming Silver Age mystery right on its cover, where a puzzled Jimmy Olsen and his new co-worker Linda Danvers each float in separate thought bubbles — Jimmy imagining Linda cozying up to Superman, while Linda secretly worries about her hidden connection to the Man of Steel as Supergirl. Cover pencils by Curt Swan and inks by George Klein give the scene that warm, clean DC house style that defined the era, with the teaser "When Supergirl Replaced Jimmy Olsen!" promising plenty of super-powered workplace drama inside.