Terry Gross

Dr. Shirley Glass discusses "the new infidelity crisis." She's studied extramarital affairs since the mid 1970's and has written a new book called "NOT Just Friends: Protect Your Relationship from Infidelity and Heal the Trauma of Betrayal." She says that the workplace has become the new breeding ground for extramarital affairs. GLASS is, by the way, the mother of Ira Glass, of public radio's "This American Life."

Composer Alf Clausen, the man behind the music of The Simpsons. This interview first aired May 14, 1997.

Matt Groening, the creator of The Simpsons, talks with TV critic David Bianculli about the series. TV's longest-running animated series broadcasts its 300th episode Feb. 16, 2003. The Simpsons were first featured during episodes of The Tracey Ullman Show, then earned their own prime-time series in 1990. This interview first aired April 22, 1998.