(14 episodes, 2004-2016)
creator (5 episodes, 1982-1984)
episode (unknown episodes)
written by (2 episodes, 1997-1999)
(9 episodes, 2001-2020)
(9 episodes, 2001-2019)
screenplay (1 episode, 2007)
(9 episodes, 2004-2018)
(9 episodes, 2007-2023)
(8 episodes, 2001-2006)
created by (4 episodes, 2007-2014)
idea (3 episodes, 2010-2014)
(7 episodes, 2011-2022)
episodes (unknown episodes)
writer (3 episodes, 1986-1999)
(6 episodes, 1997-2010)
(6 episodes, 1998-2021)
co-writer (1 episode, 2007)
writer (1 episode, 2007)
(6 episodes, 1999-2006)
writer (1 episode, 1999)
written by (1 episode, 2006)
(6 episodes, 2009-2020)
by (1 episode, 2013)
writer (1 episode, 2009)
(6 episodes, 2012-2018)
writer (1 episode, 2018)
(6 episodes, 2017-2020)
writer (2 episodes, 2007-2008)
(5 episodes, 2000-2007)
(5 episodes, 2005-2022)
(5 episodes, 2006-2021)
written by (2 episodes, 2006-2008)
writer (1 episode, 2010)
writer (4 episodes, 2007-2009)
(5 episodes, 2006-2009)
(5 episodes, 2011-2019)
(5 episodes, 2014-2018)
(5 episodes, 2014-2017)
(5 episodes, 2015-2020)
writer (1 episode, 2016)
(5 episodes, 2016-2020)
(5 episodes, 2016-2018)
(5 episodes, 2018-2023)
idea (2 episodes, 2023)
(4 episodes, 1994-2002)
(4 episodes, 2001-2007)
writer (1 episode, 2003)
(4 episodes, 2002-2019)
book (1 episode, 2019)
(4 episodes, 2003-2007)
(4 episodes, 2005-2009)
(4 episodes, 2005)
(4 episodes, 2006-2010)
(4 episodes, 2014-2022)
(3 episodes, 1996-2005)
(3 episodes, 2000-2004)
(3 episodes, 2003)
(3 episodes, 2005-2019)
(3 episodes, 2006)
(3 episodes, 2015-2019)
(3 episodes, 2015-2017)
(3 episodes, 2016-2019)
(3 episodes, 2018-2019)
(2 episodes, 1992-1997)
(2 episodes, 1995-2000)
(2 episodes, 1997)
writer (1 episode, 1997)
(2 episodes, 2000-2003)
(2 episodes, 2002-2003)
(2 episodes, 2003-2004)
(2 episodes, 2003)
(2 episodes, 2006)
(2 episodes, 2012)
(2 episodes, 2014-2016)
script (1 episode, 2016)
(2 episodes, 2016-2019)
(2 episodes, 2016-2018)
(2 episodes, 2017-2019)
(2 episodes, 2018-2019)
writer (1 episode, 2022)
(2 episodes, 2019)
(2 episodes, 2020-2021)
(2 episodes, 2020)
writer (1 episode, 2020)
co-writer (2 episodes, 2023)
creator (1 episode, 1982)
(1 episode, 1988)
(1 episode, 1996)
(1 episode, 1997)
(1 episode, 1998)
(1 episode, 2000)
(1 episode, 2001)
(1 episode, 2002)
(1 episode, 2003)
(1 episode, 2004)
(1 episode, 2005)
(1 episode, 2006)
(1 episode, 2008)
screenplay (1 episode, 2008)
idea and research (1 episode, 2008)
(1 episode, 2009)
(1 episode, 2012)
(1 episode, 2013)
(1 episode, 2014)
(1 episode, 2015)
(1 episode, 2016)
(1 episode, 2017)
(1 episode, 2018)
(1 episode, 2019)
(1 episode, 2020)
idea (1 episode, 2020)
(1 episode, 2021)
(1 episode, 2022)
(1 episode, 2024)