Rare pairings slash index >> McKay/Sheppard
Chasing the Dragon by
Z's an interesting compound. It makes people malleable but not weak-willed, even though there are ways around stubbornness. It's also been used as an aphrodisiac, a painkiller, and a backdoor to dream sleep. Quick-acting and long-lasting, Z allows people to access greater brainpower, manifests as temporary strength and agility, and is deadly addictive.
La petite mort, within fields of poppies by
Also: Beckett/Parrish, Woolsey/Dex, and implied swapping with the the following two groups - McKay/Sheppard/Lorne/Zelenka and Beckett/Parrish/Woolsey/Dex
The World According to Rover by
Ancient intelligent carts. Established from part 2 onwards. Mostly McKay/Sheppard, but with other pairings, some of which have episodes and parts dedicated to them: Beckett/Zelenka, Lorne/Chuck, Cadman/O'Neill!Clone, Grodin/OFC (Lindstrom), Bates/Lindstrom, Weir/Paul Davis, implied Jack/Daniel.
Timing, Temerity, and Tupperware by
Interconnected set of stories featuring Chuck, Zelenka/Lorne and McKay/Sheppard