Plot summary
Rodney McKay is invited to a landmark scientific presentation by an old rival (played by Dave Foley ) from his school days and takes Keller with him. The device appears to be a solution to global warming, but then everything goes awry. The plan, using a matter bridge to transfer heat to an alternate reality based on the work McKay and Jeannie did in " McKay and Mrs. Miller " backfires when it won't shut off. Eventually the bridge is shut down and after McKay saves Keller's life she admits she loves him and they start a relationship. Bill Nye and Neil deGrasse Tyson make cameo appearances.
Credits
Adapted from Wikipedia contributors, Stargate Atlantis season 5. HTML formatting and reference markers removed.