
Seven the Hard Way (2) - S7-E16
Continuity mistake: When Topanga joins the group hug, the piece of paper that Eric wrote on is underneath her. When Cory joins in, the paper has disappeared. It then reappears when Mr. Feeny dismisses everyone. (00:20:10 - 00:20:45)
Answer: Topanga's middle name is never specified. Considering her sister's name is Nebula Stop-the-war Lawrence, Topanga's is probably something equally unusual.