If you're reminded while watching the "Dark Knight Rises" that Michael Caine can communicate more with a look than most other actors do with two hours of dialogue, you'll appreciate this Michael Caine master-class on acting recorded about 25 years ago.
While geared primarily towards film acting, as advertised, many of the basic acting concepts he discusses apply just as much to voice as on-camera acting. A must-watch for anyone who aspires to call him-/herself an actor of any kind. Well-worth the investment of an hour of your time.
Michael Caine teaches the art of acting to a few lucky students.