At the beginning of the episode, Hank says he looks like an FBI agent. Which David Duchovny played FBI Agent Fox Mulder in The X Files.
When Hank Moody is standing in front of the mirror quickly opens and closes his suit jacket after he says he looks like an FBI agent. This is a reference to the episode of the X-files called "small potatoes (season 4 episode 20)". In this episode Eddie Van Blundht "impersonates" Mulder and stands in front of a mirror opening his coat and practicing being an FBI agent.
This episode marks the first mention of Karen's last name: Vanderbeek.
Karen asks Mia to stay home and watch the Woody Allen movie Manhattan, which is about the relationship between 42 year old Isaac, played by Allen, and 17 year old Tracy, played by Mariel Hemingway.
After dressing in a suit, and brushing his hair, Hank says "I look like an FBI Agent", looking exactly like his character Fox Mulder from The X-Files (1993).