A series of five broadcasts of stage musicals and plays starts with Stephen Sondheim and George Furth's acclaimed show Company, which was filmed at London's Donmar Warehouse theatre in February 1996. Directed by Sam Mendes, the musical is an exploration of love, sex and relationships in Manhattan. Songs featured include The Ladies Who Lunch, Barcelona and Being Alive. During the interval, Mendes interviews Sondheim. See today's choices.