In January 2009, McCormack returned to television in the TNT drama "Trust Me", co-starring Tom Cavanagh. The series, set around a fictional advertising firm, starred McCormack as Mason McGuire, the firm's newly promoted creative director, and deals with his best friend's (Cavanagh) unpredictable behavior. In an interview with "USA Weekend", McCormack revealed he was not afraid of being typecast. McCormack's decision to do the show was due to "great writing". The show debuted on January 26, 2009, and was watched by almost 3.4 million viewers. "Trust Me" debuted to very positive reviews, with Tim Goodman of the "San Francisco Chronicle" writing, "...the series is surprisingly solid." Mary McNamara of the "Los Angeles Times" wrote that McCormack and Cavanagh "manage to keep their characters sharply defined but low-key. They are opposites but not in an ash-smudged, Windex-wielding Felix and Oscar way." The series, however, was cancelled after one season, due to poor ratings.