The recent New Yorker cover showing Sesame Street's Bert and Ernie as a gay couple, delighted by the American Supreme Court ruling that the Defence of Marriage Act is unconstitutional, prompts Sarah Dunant to reflect on the power of cartoons to convey social messages. "Those cartoon characters - or their puppet equivalents - which touch us at our most formative moments of early childhood will become part of the bedrock of our cultural belonging." Producer: Sheila Cook.