In the episode "Tin Man," the SG-1 team is:
duplicated as androids, and eventually decide to stay behind and repair the broken down facility.
Later, in the episode "Double Jeopardy," they:
appear on the world Juna and help the "real" SG-1 team, while also sacrificing themselves (the robotic team).
Is there any mention of what happened to Harlan, the old facility, and how the team got to Juna?