 " Business School " is the seventeenth episode of the third season of the American comedy television series The Office , and the show 's forty @-@ fifth episode overall . Written by Brent Forrester , and directed by Buffy the Vampire Slayer and Firefly creator Joss Whedon , the episode aired on NBC on February 15 , 2007 . 
 " Business School " <a href='drop_aux' title='1'><mark>is</mark></a>the seventeenth episode of the third season of the American comedy television series The Office , and the show <a href='null_genetive' title='2'><mark>'s</mark></a>forty @-@ fifth episode overall . Written by Brent Forrester , and directed by Buffy the Vampire Slayer and Firefly creator Joss Whedon , the episode aired on NBC on February 15 , 2007 . 
 bizness schoo  da seventeenth episode of tdathird season of the American comedy television series The Office , and the show  forty @-@ fifth episode overall . Written by Brent Forrester , and directed by Buffy the Vampire Slayer and Firefly creator Joss Whedon , thdapisode aired on NBC on February 15 , 2007 .