Judith Beheading Holofernes by Lucy Gough. The first of three drama-documentaries this week looking at the creation of specific paintings. Germaine Greertalks about Artemesia Gentileschi's dramatic interpretation of the apocryphal story of Judith's seduction and decapitation of the enemy leader Holofernes. The drama examines the events in Artemesia's private life which fed into the painting, and reflects on the problems of being a female artist in 17th-century Florence. A dramatic tale of an artist and her work. Producers Rosie Boulton and Peter Leslie Wild (R)