to retrieve the Casket. Against Odin's order, Thor travels to Jotunheim to confront Laufey, accompanied by his brother  Loki  ( Tom Hiddleston ), childhood friend  Sif  ( Jaimie Alexander ) and the  Warriors Three ;  Volstagg  ( Ray Stevenson ), Fandral  ( Joshua Dallas ) and  Hogun  ( Tadanobu Asano ).