The Key returns three years later. During his last attack on the League, he left a subconscious command in their minds that would not allow them to leave the League's headquarters for one hour. At the end of that time, each Leaguer would turn on another and kill him or her. Superman defeats the Key by going back in time and sending his un-hypnotized self forward in time. He defeats each Leaguer in turn, and then imprisons the Key in the Fortress of Solitude in suspended animation.