created by (159 episodes, 2001-2017)
written by (51 episodes, 2001-2011)
creator (unknown episodes)
story (4 episodes, 2001)
written by (47 episodes, 2005-2015)
staff writer (11 episodes, 2008-2011)
writer (4 episodes, 2011-2014)
(57 episodes, 2005-2015)
story (3 episodes, 2005-2006)
written by (50 episodes, 2009-2017)
(52 episodes, 2009-2017)
story editor (1 episode, 2015)
story (1 episode, 2009)
teleplay (1 episode, 2016)
written by (45 episodes, 2001-2006)
story (7 episodes, 2001-2006)
creator (1 episode, 2004)
written by (41 episodes, 2001-2005)
story by (1 episode, 2005)
writer (1 episode, 2005)
written by (30 episodes, 2009-2017)
staff writer (6 episodes, 2010-2011)
writer (6 episodes, 2009-2014)
(39 episodes, 2009-2017)
written by (36 episodes, 2002-2009)
written by (25 episodes, 2009-2017)
staff writer (18 episodes, 2014-2017)
written by (23 episodes, 2013-2017)
story (1 episode, 2016)
staff writer (16 episodes, 2016-2017)
written by (21 episodes, 2013-2017)
staff writer (15 episodes, 2016-2017)
written by (17 episodes, 2016-2017)
written by (17 episodes, 2001-2005)
written by (17 episodes, 2001-2004)
written by (12 episodes, 2013-2014)
writer (3 episodes, 2013-2014)
(15 episodes, 2013-2014)
written by (14 episodes, 2001-2004)
written by (10 episodes, 2014-2015)
story by (3 episodes, 2013-2014)
writer (1 episode, 2014)
story (12 episodes, 2008-2011)
written by (11 episodes, 2001-2004)
written by (6 episodes, 2009-2011)
(11 episodes, 2009-2011)
written by (8 episodes, 2013-2014)
created by (9 episodes, 2001-2004)
story (1 episode, 2003)
written by (9 episodes, 2002-2004)
written by (8 episodes, 2003-2005)
(8 episodes, 2014-2017)
written by (7 episodes, 2014-2017)
story (6 episodes, 2002-2006)
written by (1 episode, 2011)
written by (5 episodes, 2010-2014)
(7 episodes, 2010-2014)
writer (1 episode, 2010)
story (3 episodes, 2001)
written by (1 episode, 2001)
written by (4 episodes, 2014)
written by (3 episodes, 2001-2002)
story (2 episodes, 2001)
written by (3 episodes, 2003)
written by (2 episodes, 2001)
written by (2 episodes, 2002-2003)
written by (2 episodes, 2002)
story (2 episodes, 2005)
written by (2 episodes, 2008-2009)
story (1 episode, 2008)
written by (1 episode, 2009)
written by (2 episodes, 2011)
writer (1 episode, 2001)
story (1 episode, 2001)
written by (1 episode, 2002)
story (1 episode, 2002)
(1 episode, 2002)
written by (1 episode, 2003)
(1 episode, 2005)
written by (1 episode, 2005)
written by (1 episode, 2008)
written by (1 episode, 2010)
written by (1 episode, 2014)
story (1 episode, 2017)