writer (1,380 episodes, 2005-2014)
(1,382 episodes, 2005-2014)
creator (1,264 episodes, 2005-2014)
writer (1,264 episodes, 2005-2014)
writer (1,187 episodes, 2007-2014)
(1,189 episodes, 2007-2014)
writer (1,051 episodes, 2008-2014)
head writer (17 episodes, 2009-2012)
writer (868 episodes, 2008-2014)
(1,051 episodes, 2008-2014)
head writer (187 episodes, 2008-2009)
writer (1,050 episodes, 2008-2014)
writer (773 episodes, 2010-2014)
consultant writer (193 episodes, 2005-2006)
writer (438 episodes, 2005-2012)
(766 episodes, 2005-2014)
writer (670 episodes, 2009-2014)
(670 episodes, 2009-2014)
head writer (339 episodes, 2005-2008)
writer (242 episodes, 2008-2009)
head writer (340 episodes, 2005-2009)
writer (108 episodes, 2008-2012)
(491 episodes, 2005-2012)
writer (425 episodes, 2005-2012)
(426 episodes, 2005-2013)
(426 episodes, 2005-2012)
writer (425 episodes, 2006-2012)
(426 episodes, 2006-2013)
(426 episodes, 2006-2012)
writer (336 episodes, 2010-2012)
(344 episodes, 2010-2014)
writer (339 episodes, 2005-2008)
writer (213 episodes, 2013-2014)
writer (189 episodes, 2007-2010)
writer (159 episodes, 2008)
writer (102 episodes, 2012-2014)
writer (85 episodes, 2013-2014)
writer (7 episodes, 2010-2014)
writer (4 episodes, 2008)
(2 episodes, 2013-2014)
contributing writer (1 episode, 2009)