I'd love to get fans' input on their favorite Seinfeld character who appeared in one episode, and one only, thereby disqualifying the Jerry and George's parents, Bania, Susan, etc. Some candidates obviously come to mind (the soup guy), but my favorite was the tax accountant who was committed after a relationship with George. I liked it for two reasons: 1. A weird idea for a character. Why would a tax accountant, of all people, go mad? (As opposed to going postal.) 2. She was wonderfully played by Valerie Mahaffey, a first-rate comic actress who should've become the 1990s Julie Hagerty. (Maybe she has; they've both effectively vanished from the world of movies and TV!)
Let's hear your nominations, and explain why...