<P> The following day, John and Number Six unite their blue rocks and discover the location of the other four surviving Garde . John decides to let Sam come with them in hopes of finding Sam's father . They set off to find the others so they can all protect Earth from the Mogadorians, leaving Sarah and a repentant Mark, who lies to his father about John's whereabouts, telling him to head west since he told his father he was heading east, and returns a magic box left to John by his Dad that Henri hid that was in police evidence . John thanks Mark and promises Sarah that he will come back to Paradise to find her . While they share their goodbye kiss a hurt and slightly agitated Mark is shown, before shakes his head before waving and putting a fake smile . The movie ends with John, Sam, Bernie and Number Six driving out towards the sunset smiling and vowing to protect their new home, Earth . </P> <Ul> <Li> Alex Pettyfer as John Smith / Number Four </Li> <Li> Timothy Olyphant as Henri </Li> <Li> Teresa Palmer as Number Six </Li> <Li> Dianna Agron as Sarah Hart </Li> <Li> Callan McAuliffe as Sam Goode </Li> <Li> Kevin Durand as Mogadorian Commander </Li> <Li> Jake Abel as Mark James </Li> <Li> Jeff Hochendoner as Sheriff James </Li> <Li> Patrick Sebes as Kevin </Li> <Li> Greg Townley as Number Three </Li> <Li> Reuben Langdon as Number Three's Guardian </Li> <Li> Emily Wickersham as Nicole </Li> <Li> Brian Howe as Frank </Li> <Li> Andy Owen as Bret </Li> <Li> Charles Carroll as Sam's Stepfather </Li> <Li> Garrett M. Brown as Mr. Simms </Li> <Li> Cooper Thornton as Mr. Hart </Li> <Li> Judith Hoag as Mrs. Hart </Li> <Li> Beau Mirchoff as Drew </Li> <Li> Tucker Albrizzi (uncredited) as Tuck </Li> </Ul> <Li> Alex Pettyfer as John Smith / Number Four </Li> <Li> Timothy Olyphant as Henri </Li>

What is the movie i am number four about