At 17:14 Rich says "It's like Grand Central Station in here." This is a common error. "Grand Central Station" is the U. S. Postal Service facility in the building above "Grand Central Terminal" where crowds of people use trains to/from the northern suburbs.
At 24:39 there is an error in the English subtitles. Weller's mother refers to "my own addictions" but the subtitles have "additions" instead.
The production code was T30.10069.
The episode title "Everybody Hates Kathy" could be a reference to the TV series Everybody Loves Raymond (1996) with Ray Romano.
This episode's title may be an homage to the 2006 series " Everybody Hates Chris".