 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 . 
