I'm having trouble finding much about them in the episode description:
Ashley Tisdale (High School Musical)
Ben Foster (X-Men: Last Stand)
Efren Ramirez (Napoleon Dynamite)
Taran Killam (Boston Public)
Haley Duff (Hillary’s sister)
Milo Ventgimilia (Heroes)
Taran Killam (Saturday Night Live)
Will Arnett (Arrested Development)
Amber Tamblyn (Joan of Arcadia)
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Not sure about your list but that hilarious "SMELL THIS SHOE!" lady is now on Mike and Molly. I caught a piece of it last week and it appeared to be a side story involving a kid and his grandma.
My son recognized a boy who went on to play X-ray on the movie Holes and there was another boy from Joan of Arcadia on there after Amber had her role.
I just finished them all and think it really stinks that they didn't at least let Kelley write one last episode to close off all the characters storylines somehow. So ignorant!
So I don't remember specifics. I think Will Arnettplayed a prosthetic limb salesman and sales Guber and Ms peters her new hand. Ben Foster was in a couple of eps and played a student that was close to Harry Senate and he had a fatal illness. Ashley Tisdale played a student who wanted birth control advice from Lauren Davis.
shareOh and Milo Ventimiglia played a cop who was undercover in the school to try and nail a drug dealer. He also starts to date Ms Torres.
shareWierd, there was also a female cop who was undercover, trying to bust a drug dealer. Because of an Ian/Ivan name mixup, she approached a straight-laced top student instead of a known drug dealer.
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"The sun is shining...but the ice is slippery."
Chris Evans was in season one. Held up the school with a gun. He was sooooo young but absolutely was amazing. Had a gun to Lauren's head but Harry came in and took care of business.
Senate FTW.
"Clark has more issues than Rolling Stone." - Chloe Sullivan