Cast and credits of Understanding

Candice Bergen
Herself (3 episodes, 1995)

Jane Curtin
Herself (2 episodes, 1997)

Peter Coyote
Narrator (2 episodes, 2000-2004)

H. Jon Benjamin
Quark (1 episode)

J. Craig Venter
Himself - President: Celera Genomics (1 episode, 2002)

Richard Dawkins
Himself - Author (1 episode, 2002)

Bridgett Riley
Herself - 'Baby Doll', woman boxer (1 episode, 2002)

Michael Shermer
Himself - Skeptic Magazine (1 episode, 2002)

Neal Stephenson
Himself (1 episode, 1996)

Stephen W. Schriver
Himself (1 episode, 2000)

Cynthia Breazeal
Herself (1 episode, 2002)