Can anyone tell me which episode/episodes that each girl was not
in?

I don't really know. But I do know Blair was in every episode. That should narrow it down a bit. http://www.sitcomsonline.com/ubb/smile.gif

Blair wasnt in the episode where Natalie lost her virginity. Thats the only one she wasnt in.

I know jo was not in smile , blair was not in the first time.

Nat wasn't in the episode where they throw the Alice in Wonderland-themed birthday for Blair, and the entertainer they hire stays with them for awhile.

Originally posted by jinsthewoman:
I know jo was not in smile , blair was not in the first time.

Jo also wasn't in 'My Boyfriends Back'.