Donna pretends to be Mitch's date for his brother's wedding, but he tells everyone she is his fiancée, proving Eric's suspicion of Mitch's growing affection for Donna. To regain his honor, Mitch challenges him to a fight. Meanwhile, Fez pretends to be rich, in order to impress a girl he meets at the wedding (Rachel Bilson). Kelso and Brooke attend parenting classes with Kitty as the instructor, and Red installs cable TV, only to have someone steal the signal.