He played Richie Flanscopper on Growing Pains, Gavin Doosler on Just the Ten of Us, Ned Carlson on The West Wing, Jeffrey Ambor on Close to Home,[1] Chef Alan on Suburgatory,[2] Dr. Ditmer on Masters of Sex,[3] and David Hillier in L.A.
[citation needed] He also played the role of Leonard in the series finale of Mad Men.
[5] His late father, Newt Arnold, won a Directors Guild of America Award for his work as assistant director of The Godfather Part II.
[6] His mother, Judy Arnold, was a theatrical producer.
This article about an American television actor is a stub.