A second serial, Flash Gordon’s Trip to Mars, followed in 1938, based on another Raymond storyline. Film historians have often assumed the setting was changed from Mongo to Mars to cash in on Orson Welles’s sensational radio broadcast of War of the Worlds that year. But the timing doesn’t add up: the serial was released in March, while Welles’s fear-inducing play was a Halloween performance. Mars continued to excite the popular imagination no matter the month. Besides, Buck