Main characters Clark Kent (George Reeves), Lois Lane (Phyllis Coates), Jimmy Olsen (Jack Larson), and Perry White (John Hamilton) all make their first appearances in this episode. Main character Inspector Henderson (Robert Shayne) would make his first appearance in episode 3, "The Case of the Talkative Dummy".
Some of the costumes in the Krypton scenes were hand-me-downs from the comic book/strip movie serials of the 40s. The costume that Superman's father wore was Buster Crabbe's outfit from Flash Gordon Conquers the Universe (1940). Other Kryptonians wore parts of costumes from Adventures of Captain Marvel (1941) and Captain America (1944).
In this episode, Clark's parents are named Eben and Sarah Kent -- the names used in the novel The Adventures of Superman (1942) and in the first Superman movie serial. The comic book Superboy established for all time Jonathan and Martha Kent as the names of Clark's Earthling parents.
Announcer: Yes, it's Superman, strange visitor from another planet, who came to Earth with powers and abilities far beyond those of mortal men! Superman, who can change the course of mighty rivers, bend steel with his bare hands, and who, disguised as Clark Kent, mild-mannered reporter for a great metropolitan newspaper, fights a never-ending battle for truth, justice and the American way!