AMister doesn't say why he left. Most viewers conclude that, when Mister saw Martin and Peggy handling Walter by themselves, he knew that they were able to defend themselves on their own and didn't need Mister around any more. The general consensus is that Mister most likely went back into the U.S. to kill more vampires, train more vampire hunters, and lead more survivors north to New Eden. A handful of viewers wonder whether Mister might have been infected by his fight with Jebedia and knew his time was limited.
AAlmost to Canada, Martin and Mister stop at the 'last chance before the wilderness,' a roadside restaurant run by a young girl named Peggy (Bonnie Dennison), who has survived there since her mother was killed by vampires. That night, Martin and Peggy, who are instantly attracted to each other, keep watch together. A vampire approaches, and Peggy introduces him as Walter, a boy she once went to school with but at whom she's never been able to get a clean shot, so Martin goes outside and finishes him off. Later that night, Martin and Penny sleep while Mister watches them pensively. The next morning, Martin wakes up to find that Mister has gone, leaving behind the pickup and his death-head necklace hanging from the side mirror. Martin and Peggy fill up the pickup with supplies and continue heading north until they come to a sign that says: 'Welcome to Canada...Bienvenue', over which has been painted 'New Eden.' Martin and Penny look at each other hopefully.