Longest-Running Prime-Time Shows in History

This long-running drama followed the eponymous quick-witted collie and her human companions. The first decade of seasons featured a repetitive plotline in which Lassie’s young owner (Jeff and then Timmy) would find himself in danger only to have the dog inevitably save the day.

Each episode in this documentary series details the life of a notable person in history. Over the years, “Biography” has profiled a variety of characters, from scientists to ,agicians to political revolutionaries.

The success of this elimination-style reality dating show — in which a single man must date and eventually select a potential wife from a pool of eligible women — has led to multiple spin-offs and international editions.

Originally entitled “Moneyline,” “Lou Dobbs Tonight” was a financial news program that offered economic and political commentary. Host Dobbs often welcomed politicians and economists to discuss key issues on the economy.

A rotating cast of political commentators hosted this political segment, interviewing top politicians including House and Senate leaders, defense secretaries, and U.S. ambassadors.