who wrote this episode?
Mark Hentemann
Meet the Quagmires
The episode was written by Mark Hentemann and directed by Dan Povenmire and Chris Robertson. 
what is 'meet the quagmires'? It is the 18th and final episode of the fifth season of the animated comedy series "Family Guy".
wiki:11008364
Meet the Quagmires [SEP] Introduction
It received mostly positive reviews from critics for its storyline and many cultural references. According to Nielsen ratings, it was viewed in 9.1 million homes in its original airing. The episode featured guest performances by Luke Adams, Jeff Bergman, Adam Carolla, Beth Littleford and Will Sasso, along with several recurring guest voice actors for the series.