Premiered: January 25, 2001, on ABC
Premise: A weekly newsmagazine addressing political, social and cultural issues. In its original format, hosts Sam Donaldson and Diane Sawyer bantered before a studio audience, but it flopped and producers quickly adopted a straight-news approach. ABC merged it with '20/20' in 1999, but revived it in 2001, and later offered editions devoted to medical mysteries and 'outsiders' (2006), crime and 'family secrets' (2007), and how people react in unusual situations ('Primetime: What Would You Do?' 2008).