This was filmed as "The Spider". Prior to completion, the title was changed to "Earth vs. The Spider" and that was used for the main title on the film itself. When The Fly (1958) became a blockbuster for 20th Century Fox, American International decided to ride on their success by changing the title back to simply "The Spider" on all advertising material. The main title on the film itself was never changed.
Paul Blaisdell had created a small makeup appliance ("about the size and weight of a postage stamp") meant to go on the live tarantula's back to make it look like it had "eerie, catlike" eyes, but this was never used.
Released by American International in September 1958, this was the third Bert I. Gordon "giant menace" film to be released that year. "War of the Colossal Beast" (1958) and "Attack of the Puppet People" (1958) were released earlier in the year.
The town's theatre is playing a double feature of "The Amazing Colossal Man" (1957) and "Attack of the Puppet People" (1958). Both were recent Bert I. Gordon films also released by American International.