Been having a lot of glitches with certain missions on Skyrim, the worst one by far though is "Rescue" I think it came with the Dawnguard DLC. You have to I guess rescue the person your character is married to? Although I didn't have to rescue mine, they were still in my home.... saying that I some how rescued them haha, but anyway tried to go to the location where your supposed to kill the head vampire & He's not even there.... so the mission is just sitting there right now... Really annoying =/ Oh well lol.