Mara says the one thing Americans do better than Europeans is Bourbon. Quite literally true since law requires that any whiskey labeled 'Bourbon' be made in the United States, made from at least 51% corn, and aged in charred oak barrels.
Laura Mennell, who plays Dr. Charlotte Cross in season 5, guested on The 4400 playing "young Audrey Parker" on an episode called "Audrey Parker's Come and Gone."
At one point Seth jokingly refers to Audrey (Emily Rose) by the moniker "Ms. Marvel". Ms. Marvel (in the comic books) eventually becomes Captain Marvel. Emily Rose was on the list of fan favorites to play CAPTAIN MARVEL (2019), along with several other actresses, before it was announced at 2016 San Diego Comic Con that Brie Larson had won the role in the upcoming MCU film.
In episode 4.11 ("Shot in the Dark"), Darkside Seeker Seth Byrne (Chris Lemche) had a partner, Anderson Harris, played by Danny Masterson (of "That 70's Show" fame). Although Danny is not in this episode (explained by Anderson's striking it rich on a slot machine and quitting), his brother, Christopher Masterson, appears as Morgan Gardener.