A vintage comic book cover featuring a character named 'Sarge Steel' in a detective role. The cover has a retro aesthetic with a color palette dominated by reds, blues, and yellows. Sarge Steel is depicted in a dynamic pose, holding a gun and pointing it towards the viewer. He is wearing a hat and a trench coat. In the background, there is a character on the ground, seemingly in distress, with the words 'CASE OF THE BLACKMAILED WORLD' above him. The cover also includes a smaller inset panel with the phrase 'MASTERMIND HAS THE MERCY!' and an image of a man