creator (198 episodes, 2005-2013)
head writer (15 episodes, 2018-2019)
writer (10 episodes, 2015-2022)
(20 episodes, 2007-2011)
written by (11 episodes, 2016-2021)
(19 episodes, 2015-2021)
writer (2 episodes, 2019)
written by (13 episodes, 2005-2009)
writer (2 episodes, 2006)
(16 episodes, 2005-2010)
(16 episodes, 2015-2022)
writer (3 episodes, 2018-2021)
writer (15 episodes, 2005-2007)
creator (10 episodes, 2009-2010)
writer (10 episodes, 2008-2010)
writer (7 episodes, 2008-2012)
written by (2 episodes, 2009-2010)
(8 episodes, 2015-2019)
writer (1 episode, 2019)
story producer (5 episodes, 2007-2013)
(5 episodes, 2009-2015)
writer (2 episodes, 2009-2010)
written by (1 episode, 2009)
writer (2 episodes, 2005)
written by (2 episodes, 2006)
writer (3 episodes, 2006-2007)
writer (3 episodes, 2008-2009)
writer (3 episodes, 2009-2010)
(2 episodes, 2015)
written by (1 episode, 2008)
writer (1 episode, 2010)
(1 episode, 2011)
written by (1 episode, 2012)
(1 episode, 2016)
story editor (1 episode, 2020)