Episode #136: "Show Me the Love" - 09/24/99
Distraught to learn that her parents are getting divorced, Topanga tells Cory she wants to call off their wedding, so he and Shawn travel to Pittsburgh in an attempt to persuade her parents to get back together -- only to learn that Jedediah has left Rhiannon (Marcia Cross) for another woman.

Episode #139: "No Such Thing as a Sure Thing" - 10/15/99

Episode #142: "It's About Time" 11/05/99
Cory and Topanga's wedding day.