Warren (Cat's Cradle: Warhead)
From Tardis Wiki, the free Doctor Who reference
Warren was a teenage boy who resided in an unspecified American city. In 2007 he, Guthrie and Sean assisted Calvin Palmer in capturing Vincent Wheaton and keeping guard over him on a Turkish island until he was freed by Ace and a group of Kurdish mercenaries. (NA: Cat's Cradle: Warhead)