Coming in late, it's hard to find favorites that nobody mentioned yet!

The couple that come to mind:

Kherington & Twitch's jailbreak, aka Don't Touch Me
Pasha & Lauren's mechanical spider hip hop

Also, much as I love Kent & Neil's above-mentioned contemporary, their Broadway baseball bit is just too much fun not to name as well.

Oh, and Alex & Twitch

Gotta say, though, this season's Sasha & Alexander's paso made it onto my all time faves list. I've long since wanted to see a paso doble of girl-power, and this hit the spot.

Also from this season, the jail piece was a nifty exploration of constraints.