Original: Realizing that this will unleash the Aliens on Earth , Ripley , the mercenaries , Wren , a marine named DiStephano ( Raymond Cruz ) , and a surviving Alien host , Purvis ( Leland Orser ) , attempt to escape on the Betty and destroy the Auriga .
Simplified: Knowing that this will free the aliens on Earth , Ripley , the mercenaries , Wren , a surviving marine named DiStephano , and a surviving alien host , Purvis , set out to escape on the Betty and then destroy the Auriga .