Summary in simple words: Rodney is recluse and John has a kid.
Summary in not so simple words: Rodney McKay has given up on the world, living a simple life up on a mountain devoid of people. He likes it that way, at least he did until a kid with a full head of dark hair ambled up his dirt driveway and changed his sequestered life forever.
(AU - Set during SG1 & Pre-SGA timeline.)
- Part 1 of Bunker Life
It's all in the title. An epilogue, if you like those sorts of things.
Rodney fulfills his promise to John.
- Part 2 of Bunker Life