During the 2001 Broadway season, McCormack briefly portrayed Professor Harold Hill (replacing Craig Bierko) in the Susan Stroman revival of "The Music Man" at the Neil Simon Theatre. In August 2002, as part of the Hollywood Bowl's summer concert series, he reprised the role of Harold Hill for a one-night only appearance in which he and other actors recreated the songs from the production. McCormack hosted the fourth episode of the 28th season of the sketch comedy show "Saturday Night Live" on November 2, 2002. In 2004, he had a recurring role as Ray Summers on Showtime's comedy drama "Dead Like Me". The following year, McCormack starred in the film "The Sisters", based on Anton Chekhov's play "Three Sisters". The film premiered at the 2005 Tribeca Film Festival.