Tales of Suspense #51

After helping Iron Man catch a crook, expert an contortionist turns to the criminal life, calling himself Scarecrow (alias the Uncanny Umberto), who then steals weapon plans from Stark's penthouse. Though Stark agrees to pay ransom on the plans, Scarecrow quickly goes back on his word, whisking the plans away toward Cuba. Only Iron Man can catch him in time.Erstwhile, a jealous Pepper Potts sabotages Tony Stark's romantic life."The Green Thing" (Lee, Lieber, Fox, Simek); "Tales of the Watcher: The Primitive" (Lee, Lieber, Bell, Rosen)