dialogue (344 episodes, 2008-2018)
screenplay (19 episodes, 2008-2014)
story (17 episodes, 2008-2014)
screenplay (252 episodes, 2006-2018)
story (230 episodes, 2006-2018)
screenplay (190 episodes, 2004-2018)
story (172 episodes, 2004-2018)
dialogue (1 episode, 2017)
screenplay (165 episodes, 2007-2016)
story (158 episodes, 2007-2016)
dialogue (18 episodes, 2008)
concept (1 episode, 2018)
dialogue (152 episodes, 2007-2018)
screenplay (4 episodes, 2009-2011)
story (3 episodes, 2009-2011)
dialogue (128 episodes, 2014-2015)
screenplay (107 episodes, 2013-2018)
story (95 episodes, 2013-2018)
dialogue (99 episodes, 2012-2014)
dialogue (98 episodes, 2012-2014)
story (72 episodes, 2006-2018)
screenplay (24 episodes, 2016-2018)
co-writer (7 episodes, 2000-2018)
writer (7 episodes, 2000-2018)
dialogue (1 episode, 2006)
screenplay (59 episodes, 2005-2018)
story (53 episodes, 2005-2016)
screenplay (65 episodes, 2008-2015)
story (62 episodes, 2008-2015)
screenplay (53 episodes, 2010-2012)
story (47 episodes, 2010-2012)
dialogue (1 episode, 2012)
screenplay (47 episodes, 2010-2018)
story (43 episodes, 2010-2017)
screenplay (28 episodes, 2006-2011)
story (28 episodes, 2006-2011)
dialogue (24 episodes, 2007-2011)
dialogue (43 episodes, 2015-2016)
dialogue (37 episodes, 2007-2008)
dialogue (37 episodes, 2016-2018)
screenplay (23 episodes, 2004-2007)
story (18 episodes, 2005-2007)
dialogue (16 episodes, 2006)
dialogue (34 episodes, 2007-2018)
screenplay (1 episode, 2017)
dialogue (27 episodes, 2000-2016)
story (3 episodes, 2003-2009)
story idea (2 episodes, 2014)
creator (1 episode, 1998)
screenplay (33 episodes, 2012-2014)
story (31 episodes, 2012-2014)
dialogue (29 episodes, 2010-2012)
story (24 episodes, 2016-2018)
screenplay (14 episodes, 2016-2018)
screenplay (24 episodes, 2017-2018)
story (16 episodes, 2017-2018)
dialogue (27 episodes, 2015-2016)
screenplay (24 episodes, 2012-2017)
story (21 episodes, 2012-2017)
screenplay (23 episodes, 2010-2013)
story (23 episodes, 2010-2013)
screenplay (15 episodes, 2003-2007)
story (8 episodes, 2005-2007)
(22 episodes, 2002-2007)
writer (2 episodes, 2002-2003)
dialogue (22 episodes, 2006-2007)
screenplay (1 episode, 2006)
story (1 episode, 2006)
screenplay (20 episodes, 2015-2016)
story (20 episodes, 2015-2016)
dialogue (18 episodes, 2015-2016)
story idea (1 episode, 2016)
dialogue (18 episodes, 2006-2014)
screenplay (15 episodes, 2005-2016)
story (14 episodes, 2005-2016)
writer (1 episode, 2004)
(14 episodes, 2018)
dialogue (13 episodes, 2004-2005)
dialogue (12 episodes, 2015-2016)
story (2 episodes, 2015)
dialogue (11 episodes, 2012)
screenplay (11 episodes, 2015-2016)
story (11 episodes, 2015-2016)
screenplay (10 episodes, 2015-2016)
story (10 episodes, 2015-2016)
screenplay (4 episodes, 2017-2018)
story (2 episodes, 2017)
concept (1 episode, 2017)
(7 episodes, 2017-2018)
screenplay (6 episodes, 2006-2007)
story (6 episodes, 2006-2007)
dialogue (6 episodes, 2007)
story (5 episodes, 2017)
screenplay (4 episodes, 2007-2009)
story (4 episodes, 2007-2009)
story (3 episodes, 2011-2012)
screenplay (2 episodes, 2011-2012)
story idea (1 episode, 2011)
dialogue (3 episodes, 2012)
screenplay (1 episode, 2011)
story (1 episode, 2011)
screenplay (4 episodes, 2012-2013)
story (4 episodes, 2012-2013)
dialogue (4 episodes, 2014)
screenplay (4 episodes, 2014)
story (4 episodes, 2014)
dialogue (4 episodes, 2017)
dialogue (4 episodes, 2018)
writer (4 episodes, 2018)
story (3 episodes, 2006-2007)
screenplay (2 episodes, 2006-2007)
screenplay (3 episodes, 2007)
story (3 episodes, 2007)
screenplay (3 episodes, 2011)
story (3 episodes, 2011)
dialogue (3 episodes, 2015-2016)
screenplay (3 episodes, 2015)
story (3 episodes, 2015)
dialogue (3 episodes, 2018)
screenplay (3 episodes, 2018)
story (1 episode, 2018)
writer (1 episode, 2000)
story (2 episodes, 2000-2001)
story (2 episodes, 2003)
screenplay (1 episode, 2003)
dialogue (2 episodes, 2004)
dialogue (2 episodes, 2006)
story idea (1 episode, 2006)
story idea (1 episode, 2007)
story (1 episode, 2013)
story (2 episodes, 2007-2010)
screenplay (2 episodes, 2010)
story (2 episodes, 2010)
screenplay (2 episodes, 2011)
story (2 episodes, 2011)
screenplay (2 episodes, 2012)
story (2 episodes, 2012)
screenplay (2 episodes, 2014)
story (2 episodes, 2014)
dialogue (2 episodes, 2015)
screenplay (2 episodes, 2016-2017)
story (1 episode, 2016)
screenplay (1 episode, 2016)
dialogue (1 episode, 2000)
story (1 episode, 2007)
screenplay (1 episode, 2007)
story idea (1 episode, 2008)
screenplay (1 episode, 2010)
story (1 episode, 2010)
story (1 episode, 2012)
screenplay (1 episode, 2012)
story idea (1 episode, 2014)
screenplay (1 episode, 2014)
story (1 episode, 2014)
(1 episode, 2014)
dialogue (1 episode, 2014)
screenplay (1 episode, 2015)
story (1 episode, 2015)
dialogue (1 episode, 2016)
(1 episode, 2018)
