Episode Name: The Greatest Gift
Air date: 12/6/2011
Summary: Pete Lattimer is hit in the head by an artifact and wakes up to a life where he was never born. Pete must hunt down and persuade the Warehouse team (none of whom recognize him) to go on this life or death mission with him to vanquish a long dead nemesis from the past to get everyone’s lives back.
Watch or download Warehouse 13 – Season 3 Episode 13 – The Greatest Gift at below links.