Randall the Mailman
Randall the Mailman is a high-strung Odyssey mail man who frequently appeared in the wraps with Chris in the early years of the show. He is voiced by Phil Lollar and seems to be based largely on the character Barney Fife from The Andy Griffith Show.
After several early-season appearances alongside Chris in episode wraps, Randall made an in-episode appearance in #269: “Fences” delivering mail to Connie Kendall's neighborhood. By alerting Connie and her mother to Mr. Mitchell's apparent absence, he likely inadvertently saved Mr. Mitchell's life.