 McCormack portrayed con artist Clark Rockefeller in the Lifetime television movie Who Is Clark Rockefeller ? , which premiered on March 13 , 2010 . To prepare for the role , he read everything on the case , including coverage of the case and Rockefeller 's jailhouse interview . Who Is Clark Rockefeller ? received mixed reaction , but McCormack 's performance was favored by critics , with Variety 's Brian Lowry concluding , " ... the real kitsch factor resides in Eric McCormack 's performance as the suave charmer , which adds an element of high camp to the proceedings . " 
