Our Famous First for July features Superboy (Bob Hastings, fresh from McHale's Navy) in his first animated adventure, and, wouldn't ya know, it's a 2-parter.
"The Spy From Outer Space" was presented on back-to-back weeks in September 1966. An alien race sends a spy to create disasters, but, as Superboy discovers, taking the fight to the enemy isn't always a good idea......
YouTube poster Phillysteak acknowledged that these were the first two Superboy shorts, not #'s 13-14, as shown above. The opening title box was deleted to avoid the copyright patrol.