Switching frequencies from opera's Luciano Pavarotti (Sept. 24) to rock 'n' roll's The Whosubject of this week's cover storyis not too much to ask of a music editor. But add responsibility for editing major stories on the movies' Kramer vs. Kramer (Dec. 3), television's Mork (March 12), ballet's Gelsey Kirkland (May 1, 1978), and the job calls for Martha Duffy. As senior editor of TIME's Cinema, Music, Dance, Show Business, Television and Theater sections for the past five years, she is in effect the magazine's performing arts expert.
Duffy, who was a TIME book reviewer for five years before taking on...