Guest Stars Roark Critchlow as Dr. Mike Horton Dan Castellaneta as The Zookeeper Brooke Shields as Erika Ford Tahj Mowry as Kid Fred Willard as Mr. Lipson Chris Isaak as Rob Donnen D. Elliot Woods as Walter Lisa Roberts as Cathy Lawrence Mandley as Security Guard Sean Masterson as "Monkeyshine" Guy Karen Kruschke as Coma Woman