Barry Livingston is an actor who played a speechwriter in the episode The Fall's Gonna Kill You. He is best known for his starring role as a child on My Three Sons (alongside Ronne Troup). He also has had recurring roles on the shows Bosch (starring Amy Aquino and Lance Reddick), Truth Be Told, Trial & Error and The Adventures of Ozzie and Harriet.
He has also appeared in a number of films, including Masters of the Universe, Zodiac (with Philip Baker Hall, John Carroll Lynch, Paul Schulze, Thomas Kopache, John Hemphill, Michael Edward Rose, J. Patrick McCormack, Cazimir Milostan, John H. Tobin, Ted Garcia, and John Getz), Argo (with Baker Hall, John Goodman, Zeljko Îvanek, Matthew Glave, Jamie McShane, Larry Sullivan, Randy Oglesby, Victor McCay, Bill Blair and Michael Chieffo) and the Aaron Sorkin penned The Social Network (with Getz, Wallace Langham, Scott Lawrence and Nancy Linari).