LOST star Matthew Fox will reportedly join Sylvester Stallone in the fourth Rambo movie - as a wrongly accused fugitive. The actor, who plays DR JACK SHEPHARD in the island drama, will play PATRICK MERCHANT, according to top Stallone news website SlyCentral.com. A posting on the site says, "Fox's salary is being determined as he is asking for some form of script control and wants to share screen time with Sly."