 General Landry accompanies SG-1 on the Odyssey to planet Orilla, to meet the Asgard high council, the majority of which feels obliged to give the starship the ultimate upgrades and pass on to the human  fifth race  its entire knowledge and civilization, because their ancient race is facing extinction from a genetic disease they feel has gone so far it s time for collective euthanasia. Then three Ori ships attack and the planet explodes- the untested Asgard energy weapons must be used. Two Ori mother-ships have followed even after a hyper-drive jump; Carter thinks they may be tracking the new systems, but they cannot be turned off without suspending all ship systems- they do it... but should they beam down to a Stargate planet and lose all technology as the ship self-destructs during an Ori attack? There is a grim fight, but the fatal Ori energy burst is stopped when Carter creates a time bubble which delays it by years, hoping to master the Asgard technology before their three months  survival supplies run out. After two weeks, her three known options prove unacceptable. Yet she finds ways to manufacture additional supplies, which buys them much more time. While Daniel philosophizes grimly about the end of the superior Asgards by a single error, Vala wants to get physical. He calls her the least fit mate. Pastimes lose their charm as time goes by. After twenty years, Landry dies; after fifty, Carter finds how to reverse time locally, but their energy source is depleted too far by then. Cam suggests using the very Ori beam which approaches them; it can only work if automated to kick in after they are dead, hopefully only for milliseconds, but one of them must remain old as the others will lose the indispensable memories to do better in repeated time- Teal c is chosen. It works; Teal c refuses to tell them anything, fearing to upset time.