Jimmy Olsen garners unwanted attention after news reporter Angela Chen dubs him "Superman's Pal." Jimmy soon runs into more trouble than usual, so Superman must come to his rescue more often. Meanwhile, Jimmy has begun dating a young Daily Planet intern, who has a "thing" for metal. She uses Jimmy to lure Superman into a trap—a confrontation with one of Superman's strongest enemies...Metallo.

Superman and Supergirl must save Smallville, and the world, from the Reverend, a gargantuan scouting probe disguised as a human reverend named Powell, as well as its master, an even larger alien parasite that wishes to unite Earth's inhabitants in perpetual unity.