Former Monty Python star John Cleese has a new co-star - Prince Charles. The two made a 25-minute instructional videotape, "Grime Goes Green: Your Business and the Environment," a light-hearted look at how businesses can help the environment. In the tape, the prince catches John Grime, a businessman played by Cleese, in a variety of environmentally unfriendly acts and teaches him a lesson. "Having thought and a care for the environment must become an integrated part of good business practice and each of us must do all we can to address one of the greatest challenges facing us today," the prince says.