The character of Walter was introduced towards the end of Seinfeld, in fact, the very last episode of Season 8, 8:22 The Summer of George. Wayne Wilderson returned during Season 9, as did Mark Daniel Cade to compete in the battle of the Walters.
He's always up for a birthday bash and finds catfights rather intriguing. He is quick in getting to know the new guys at work and can spot coffee stains with the best of them. No one is actually positive about what he does at the House of Peterman, but one thing we do know is that he attends meetings and in order to get through them, requires almost a whole bottle of water.
We don't actually know where Walter has gone since he last appeared on Seinfeld, but hopefully his polyp in the duodenum is still benign and a bastard, but whether he is hurt or not, we wish him to GET WELL, GET WELL SOON!
MISC. CHARACTERS
(per episode except Cousin Jeffrey, Larry David, Farvman, and Lauren Bowles)
Walter (Wayne Wilderson) = 4
First Times
Walter - 8:22 The Summer of George
Other Walter (Mark Daniel Cade) listed as Walter - 9:17 The Bookstore
Other Walter (Mark Daniel Cade) listed as Other Walter - 9:18 The Frogger