After another unsuccessful search for Teyla, Sheppard 'gates home to Atlantis to discover that the city is sweltering hot, utterly abandoned, and surrounded by a vast desert. Sheppard is dumbfounded until a hologram of Rodney McKay — an aged Rodney McKay — welcomes him to the future. A solar flare has interfered with the stargate, causing it to send Sheppard 48,000 years forward in time. He may now be the last human alive in the universe.

(continued)