So I free Sara chase Amdir to the entrace of the cave, Amdir kills Tordan(or whatever his name is) I talk to Tordan the talk to Sara I finish the quest but no new quest starts up and when I go back inside the hideout the quest instance The Hideout starts again as if I haven't done the quest yet can anyone please help me with this?
If you were able to finish the quest but not get the next one, it may be a level issue. The minimum level for The Hideout is 8, but the minimum level for Chasing Amdir (the next quest in the chain) is 10. Are you level 8 or 9? If so, you'll need to do some other quests for a while until you go up a couple levels, then come back to Constable Underhill to continue the Prologue.