Guest Stars Trey Parker voices Randy Marsh Trey Parker voices Mr. Garrison Mary Kay Bergman voices Sharon Marsh Trey Parker voices Mr. Mackey Mary Kay Bergman voices Liane Cartman Trey Parker voices Clyde Mary Kay Bergman voices Wendy Testaberger Isaac Hayes voices Chef Jennifer Howell voices Bebe Stevens Matt Stone voices Terrance Trey Parker voices Phillip Trey Parker voices Bill Cosby Trey Parker voices Roy