Danny: "It must be Groundhog Day for Robert Costa." This is a reference to the film Groundhog Day (1993), in which Bill Murray re-lives the same day over and over again.
Mac Taylor (Gary Sinise): "I love the smell of a cover-up in the afternoon." This is an alteration of Robert Duvall's famous line from Apocalypse Now (1979). The original line is, "I love the smell of napalm in the morning. Smells like victory.".