Two Xelthunians secretly replace Ma and Pa Kent to perform a secret mission, not knowing that the Kents are Superboy's foster parents. After Ma Kent unwisely mentions Superboy's vulnerability to kryptonite, the Xelthunians power the transporter ray .
Robert Bernstein, Henry Boltinoff, Jerry Siegel, Jack Schiff
Curt Swan, Howard Sherman, Ramona Fradon, George Papp View More
