Like its British counterpart, the series was filmed in a single-camera setup without a studio audience or a laugh track to simulate the look of an actual documentary. The series debuted on NBC as a mid-season replacement and aired 201 episodes for its run. "The Office" originally featured Steve Carell, Rainn Wilson, John Krasinski, Jenna Fischer, and B. J. Novak as the main cast; however, the series experienced numerous changes to its ensemble cast during its run. Notable stars outside the original main cast include Ed Helms, Amy Ryan, Mindy Kaling, Craig Robinson, James Spader, Ellie Kemper, and Catherine Tate.