He made his
Broadway debut in
Big River as
Tom Sawyer in 1985. Additional theatre credits include Jonathan in the
Alan Menken/
Tim Rice musical
King David, Harlequin in
Triumph of Love, Snoopy in the Broadway revival of ''
You're a Good Man, Charlie Brown (for which he won the Drama Desk Award and a Tony), Carmen Ghia and later Leo Bloom in The Producers (earning Drama Desk and Tony nominations), and The Frogs at Lincoln Center, which reunited him with fellow Producers'' star
Nathan Lane and
Susan Stroman. In 1996 and 1997, Bart appeared as Bud Frump in the USA national tour of
How to Succeed in Business Without Really Trying. On television, Bart played
George Carlin's son on
The George Carlin Show (1994), and on
Bram & Alice (2002) he portrayed Bram's assistant, Paul Newman. He became widely known to viewers with his portrayal of
George Williams, the unhinged homicidal pharmacist in love with
Bree Van de Kamp (
Marcia Cross), on
Desperate Housewives, which earned him a SAG Award. Bart also originated the lead role of Dr. Frederick Frankenstein in the musical adaptation of
Mel Brooks'
Young Frankenstein, which opened on Broadway in November 2007, following a run in Seattle. He reprised the role alongside former Broadway co-stars
Shuler Hensley and
Cory English in the United States national tour that launched in September 2009. He ended his run on August 8, 2010, and was succeeded by
Christopher Ryan. Bart originally portrayed the role of Igor in the original workshop read-through.
Brad Oscar and Bart reprised their roles as Max Bialystock and Leo Bloom, respectively, in a production of
The Producers at
Starlight Theatre in
Kansas City, Missouri. The show ran from August 23–29, 2010. In 2011, Bart was cast in the recurring role of Mason Treadwell on the
ABC drama series
Revenge. In 2013, Bart was cast in the recurring role of Roger Riskin on the
Showtime drama series
Episodes. Bart was originally set to play the dual role of
Charles Frohman and
Captain James Hook in the 2014
A.R.T. pre-Broadway production of
Finding Neverland. He was ultimately replaced by
Michael McGrath. In 2016, Bart returned to Broadway in the musical
Disaster! In 2017, Bart was cast in the recurring role of Vice Principal Nero on the second season of the
Netflix comedy-drama series
A Series of Unfortunate Events. In 2018, Bart was cast in the main role of Judge Wilson on the
Freeform drama series
Good Trouble, the spin-off of
The Fosters. In 2019, Bart was cast as Hades in the world premiere of Disney's musical,
Hercules. After playing the role at the
Manchester Opera House and West End's
Adelphi Theatre, he reprised the part in the Broadway production. In 2021, Bart cameoed in the film adaptation of
Tick, Tick... Boom!, 30 years after performing in the original show with Jonathan Larson. A character in the film played by
Joshua Henry is named "Roger" after him, and is loosely inspired by Bart. ==Filmography==