creator (118 episodes, 2007-2016)
review (563 episodes, 2007-2018)
written by (5 episodes, 2009-2019)
series creator (1 episode, 2010)
(470 episodes, 2007-2024)
written by (3 episodes, 2011-2018)
Written By (1 episode, 2019)
(10 episodes, 2010-2021)
additional writing (2 episodes, 2019-2021)
(6 episodes, 2008-2017)
dialogue (1 episode, 2009)
(4 episodes, 2009-2014)
written by (2 episodes, 2009)
(3 episodes, 2009-2016)
written by (1 episode, 2009)
(3 episodes, 2009-2014)
(3 episodes, 2019-2022)
additional writing by (1 episode, 2022)
(2 episodes, 2009-2011)
(2 episodes, 2015-2016)
(2 episodes, 2016-2017)
(2 episodes, 2018-2019)
(2 episodes, 2019-2020)
(1 episode, 2011)
(1 episode, 2012)
(1 episode, 2013)
(1 episode, 2014)
story "The Giving Tree" (1 episode, 2014)
(1 episode, 2016)
(1 episode, 2017)
(1 episode, 2018)
(1 episode, 2019)
(1 episode, 2020)
(1 episode, 2023)
story "It's a Wonderful Life" (uncredited) (1 episode, 2010)