Favorite episodes?

I know this has probably been asked before, but...
I love a lot of episodes, but I can't remember some that I really like.
Here are the ones I do remember-
Season 2 episode 8- The Woman in the Sand (Where Bones&Booth go undercover in Vegas)
Season 2 episode 9- Aliens in a Spaceship (first Gravedigger episode, was reallyyyyy amazing)
Season 4 episode 12- Double Trouble in the Panhandle (Where Bones&Booth go undercover in the circus)
Season 6 episode 16- The Blackout in the Blizzard (pretty self-explanatory)
Yours?