Trivia: The code that Hank enters ("101097") is a reference to the original "Fallout" video game, which was released on October 10th (10/10) in the year 1997 (97).
Trivia: Walton Goggins' character is named Cooper Howard. Likely in reference to Todd Howard, the executive designer and director of the Fallout series of video games at Bethesda Studios, the company that now owns the rights to the franchise and is named at The Beginning of every episode of the show.
Trivia: Cooper/The Ghoul makes a comment about being "sidetracked by bullshit every goddamn time" at one point during the first season. This is a reference to the video games, which feature dozens and dozens of side-quests that players can complete, and often can distract the player from the main narrative.
Trivia: When Lucy goes to the armory, she finds it completely gutted except for the syringer she picks up and uses throughout the season. It was the only thing left in the armory because the syringer is the worst weapon in the game and nobody EVER takes it.
Trivia: Two characters say the line "War... war never changes." This is an iconic line from the video game series.