Clark hearing a painful ringing sound in his ears that draws him to the prison where Lionel is being held. When he sees Lionel attempt to stab Lex with a strange glowing stone, Clark grabs for the stone causing the two men to switch bodies. Learning his new body has super powers, Lionel immediately begins wreaking havoc on Smallville. Trapped behind bars without his powers, Clark must figure out a way to get his body and powers back in order to save his friends and family. The idea behind this episode went all the way back to Season One, but they needed the right person for Clark to switch bodies with. This was a fun and entertaining episode.