Stargate SG-1: Gift of the Gods

Doctor Daniel Jackson wakes up on the floor of his SGC Lab, with no memory of what happened or how he got there. With him is Lt. Hunter of SG12. The team that should have accompanied SG-1 on their mission to P2K-797, but now, here they are back on earth with the members of Stargate Command incapacitated around them. What has happened? Why can no one remember?