Annie goes on the warpath when she learns that one of Ruthie's teachers has been calling her "stupid"; Simon befriends a boy (Shawn Pyfrom) with Tourette's syndrome; and Shana fears her relationship with Matt is crumbling when he keeps avoiding her phone calls. Meanwhile, Mary refuses to speak to Simon but won't tell him why. Ms. Riddle: Elizabeth Ruscio. Ruthie: Mackenzie Rosman. Annie: Catherine Hicks. Simon: David Gallagher.