Pioneers of Television on PBS

Actor John Amos describes hearing his ancestors' spirits while on the set of 'Roots.'

Comedian Dick Cavett recalls his initial meeting with Johnny Carson.

Diller recalls trouble on 'The Ed Sullivan Show.'

Nimoy describes a guest appearance on 'Gunsmoke' just before 'Star Trek.'

White describes performing live with Del Moore and forgetting her lines.

See Nimoy in one of his first science fiction roles -- as a Martian invader.

Culp describes Bill Cosby's impact on television.

Evans describes some of the 'stunts' she performed as Audra Barkley on 'Big Valley.'

Funny things happen when you're doing live TV with kids, says LA host Socoro Serrano.

White recalls the early days of 'Life with Elizabeth,' her first sitcom.

White remembers a favorite skit she performed with Johnny Carson.

Leslie Uggams and LeVar Burton on how 'Roots' brought untold history to light.

Actress Betty White remembers the early days of television.

Carol Burnett describes meeting Lucille Ball and shares her favorite Lucy anecdote.

Shatner tells a story of an actor on 'Gunsmoke' taking his bad guy role a bit too far.