enjoyed one of his favorite television roles in the TV series Leverage. In the episode "The Juror No. 6 Job", he played a con man, Avi/Donnie, a good friend of lead character Eliot Spencer, played by actor Christian Kane. Joseph also portrayed heroin dealer Omar in the feature film La Linea, which stars Ray Liotta, Andy García, and Danny Trejo. In October 2009, he played The Bank Manager who aids lead detectives Rick Castle and Kate Beckett in catching the killer in the TV series Castle (episode "Fool Me Once"). Joseph appeared in Desperate Housewives (episode "The Glamorous Life") in January 2010. Joseph's voice talents were heard in the film Eat Pray Love starring Julia Roberts, released on August 13, 2010. Legally Blonde The Musical (US and Canada; 2010–2011) Joseph co-starred as the villainous Professor Callahan in the 2nd National US/Canada Tour of Legally Blonde. For nine months from September 21, 2010 till May 15, 2011, he performed 242 shows in 96 cities and travelled 35,050 miles. He was the youngest and first actor of color to play the role. Throughout the tour, the press strongly praised Joseph's performances: in Metromix Columbus (September 28, 2010), Dwayne Steward noted that "Kahlil Joseph is creepiness personified as Professor Callahan"; in The Columbus Dispatch (September 29, 2010), Margaret Quamme wrote that "Joseph (made) a believably predatory lawyer"; Erin Millar of Examiner.com (September 29, 2010) believed "Kahlil Joseph does the slimy Professor Callahan justice (no pun intended) – the general opinion of this character was very clear in the audience"; Richard Ades of The Other Paper noted how "Some cast members do distinguish themselves, especially ... Kahlil Joseph as the hard-edged Professor Callahan" (September 29, 2010); Debbie Blassingame Hale of Chattanooga Times Free Press observed "Several standouts in the cast include: ... Kahlil Joseph as Professor Callahan" (September 18, 2010); George Walker of Indiana Public Media commented how "Kahlil Joseph is mean and lascivious as Professor Callahan" (October 20, 2010); Sue Merrell of The Grand Rapids Press remarked that "As Professor Callahan, Kahlil Joseph demands respect and is so smooth that you're not sure at first if he's villain or hero" (November 24, 2010); in Around The Town Chicago, M.D. Horn took note of "Kahlil Joseph, who instills fear in his students as Professor Callahan" (December 5, 2010); in Le Droit, a newspaper in Ottawa, Canada, critic Annik Chainey referred to Joseph as "the