Steven "Steve" Barkin (commonly known as Mr. Barkin) is a supporting character from the Disney Channel animated TV series Kim Possible. He is voiced by Patrick Warburton, who also voiced Kronk, Wolf W. Wolf, and Joe Swanson. Mr. Barkin is a substitute teacher at Middleton High School...almost always in fact!-- for unexplained reasons of frequent injuries, sickness, or vacation among other staff members, Barkin teaches a variety of classes, ranging from gym to home economics, leading to him being dubbed the school's "permanent substitute" by the show's staff.