1x13 - Superboy

The alien from ""The Alien Solution"" escapes after a thief steals the canister containing him. He wants revenge on Superboy for destroying his collection of warrior bodies. The alien possesses a policeman and stalks the Boy of Steel. When he attacks Superboy at an agriculture center, he accidentally kills the body of the policeman he's possessing, and in the process he hurts Superboy. But when he tries to take over Superboy's body, he finds he can't get in and, angry, he possesses the body of Clark's visiting father, Jonathan Kent.