Season 7 Episode 12 (December 2, 2015): The 13 Stages of Grief

Season 4 Episode 12 (December 20, 2012): A Krampus Carol

Season 6 Episode 4 (September 24, 2014): When Rafi Met Randy

Season 2 Episode 9 (November 11, 2010): Expert Witness

Season 1 Episode 4 (November 19, 2009): Mr. McGibblets