Fred Thompson, in character, mentions that he is not a DA, but that he did play one on TV, an in-joke to his character on Law & Order (1990) (1990) and spin-offs. He also says that he has been a member of the bar for 42 years, which is true-to-life.
This episode marks the introduction of Marina Vassel, played by Cady Huffman. She appears in five episodes in total.
When Will mentions about the bizarre Venezuelan case that they're working on that it's like being in a Woody Allen movie, presumably he means Bananas (1971) which is set in an unnamed South American country.
This is America Ferrera's final appearance in the show for this season. She returns for one more episode in Season 5.