 But to accomplish the operation, one person has to exist outside of the time reversal; this person will remain at their advanced age while everyone else would revert to how they were 50 years prior (thus having no memories of those 50 years).Teal'c, who as a Jaffa has a much longer lifespan than the other team members, volunteers to remain behind and perform the rescue, protected within a separate field.As the group prepares their plan, Vala and Daniel exchange a last embrace, assuring each other of their love.