creator (48 episodes, 2000-2019)
created by (45 episodes, 2000-2019)
written by (31 episodes, 2000-2008)
head writer (29 episodes, 2000-2007)
executive story editor (5 episodes, 2003-2005)
writer (1 episode, 2003)
creator (49 episodes, 2000-2019)
written by (19 episodes, 2000-2019)
writer (2 episodes, 2008-2009)
created by (93 episodes, 2000-2019)
written by (14 episodes, 2000-2015)
written by (16 episodes, 2008-2019)
staff writer (4 episodes, 2008-2009)
story editor (4 episodes, 2012-2019)
staff writer (8 episodes, 2013-2019)
writer (8 episodes, 2008-2013)
written by (4 episodes, 2010-2019)
staff writer (3 episodes, 2004-2006)
(7 episodes, 2001-2007)
written by (2 episodes, 2002-2004)
writer (4 episodes, 2009-2013)
written by (3 episodes, 2008-2012)
(5 episodes, 2003-2005)
written by (2 episodes, 2003)
writer (5 episodes, 2011-2014)
writer (1 episode, 2002)
written by (2 episodes, 2011-2013)
writer (1 episode, 2000)
written by (1 episode, 2004)
written by (1 episode, 2008)
written by (1 episode, 2010)
inspired by (1 episode, 2014)