Commander Rick has been thinking about thinking, so this week he delves into the workings of the human brain and the explores the frontiers of computer intelligence with Timothy Leary, artificial intelligence pioneer Marvin Minsky who appears via his electronic book The Society Of Mind and SF authors Greg Bear (Queen Of Angels), Vernor Vinge (A Fire Upon The Deep), Frederik Pohl (Jem), Harry Harrison (co-author (with Marvin Minsky The Turing Option), Jack Williamson ("The Metal Man"), Jerry Oltion (Isaac Asimov's Robot City, #6 Humanity), John Brunner (A Maze Of Stars), Amy Thomson (Virtual Girl), Roger Zelazny ("Home Is The Hangman") and Robert J. Sawyer (Golden Fleece). Plus Rick checks in with non-fiction authors Howard Rheingold (The Virtual Community) and Donald A. Norman (Things That Make Us Smart).