When reading Dale's note Hank says "nab criminal" but the note actually reads "collar criminal".
In the Season 9 premiere, A Rover Runs Through It (2004), they establish that Peggy has a broken relationship with her mom and hasn't spoken to her mom in 20 years, yet here it seems Peggy's mom is on their speed dial (until now) and Peggy tries to call her to stay with her.
At the beginning of the episode Bobby says he remembers when they got Ladybird when he was 1. However later in the episode Bill explains to Bobby that Hank got Ladybird when Hank and Peggy were having trouble getting pregnant, a whole year before they had Bobby (which Hank and Peggy cite as the reason they relaxed enough to successfully get pregnant).