Brady Bunch, The - I Thought That Her Name Was Patty
In the episode "My Fair opponent" Marcia tells her parents that they nominated a girl named Patty to run against Molly Webber. Later, when Molly is sitting in Marcia's room and they are talking about the contest, Molly calls her opponent as Sally. But then once again, in another scene, Marcia says Patty! I guess Molly forgot her name!