Jim Solar Space Sheriff and Dara Starr, Spacette Encounter "Trouble on Mercury"

In 1954, Vital Publications launched a single-issue comic pairing two of their space-faring heroes: Jim Solar, the Space Sheriff, and Dara Starr, the Spacette. This one-shot sends the duo on a mission to the planet Mercury, where they encounter a crisis that demands their combined skills. Though the series was brief, it stands as a unique crossover in Golden Age science-fiction comics, showcasing the era's fascination with interplanetary adventure and team-ups between independent heroes.