in Lady and the Tramp II: Scamp's Adventure. He was featured in the 2004 remake of The Stepford Wives with Nicole Kidman, Matthew Broderick, Bette Midler, Christopher Walken and Glenn Close, and in The Producers (2005), in which he reprised his role of "common-law assistant" Carmen Ghia. In December 2006, Bart played Howard "The Weasel" Montague in the Sci Fi Channel miniseries The Lost Room. In June 2007, he starred as Stuart in Hostel: Part II, the sequel to 2005's Hostel. In 2007 he had supporting roles in American Gangster and Spy School. In 2008, he appeared in Harold & Kumar Escape from Guantanamo Bay, the sequel to 2004's Harold & Kumar Go to White Castle, and Midnight Meat Train. 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. 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. That same year, he was announced to play Dr. Emmett Brown in the musical adaptation of Back to the Future. He was not able to perform in the musical's opening night in the West End after testing positive for COVID-19. In 2021, Bart cameoed in the film adaptation of Tick, Tick... Boom!,