At the cabin, at some moments Peggy (Kirsten Dunst) is watching a documentary about bugs. It's the same documentary Steve Buscemi and Peter Stormare are trying to watch in the movie, and also in a cabin. And in both (the series and the movie), the television can't be seen properly and someone tries to fix it by hitting it with their hands (Kristen Dunst in the series and Steve Buscemi in the film, Fargo (1996)).
The movie that Peggy is watching at the cabin is announced as Operation Eagle's Nest. This is the fictitious movie that Ronald Reagan talks about in episode 5.
When Hanzee (Zahn McClarnon) asks the owner of the convenience store where Ed (Jesse Plemons) is, the owner says that Ed told him "We're going crazy down there at the lake." This is a reference to the original film, Fargo (1996), when a police officer is stopped by a bartender shoveling his driveway in order to tell him that a "little guy" told him that he was "going crazy down there at the lake."
The title is the name of a birdlike character featured in prints, collages and paintings by artist Max Ernst. Loplop was an alter ego which Ernst developed and functioned as a familiar animal. Loplop first appeared in Ernst's collage novels "La Femme 100 Têtes" and "Une Semaine de Bonté" in the role of a narrator and commentator.
Above the phone in the Rushmore Grocery Store are boxes of Pinhead Shot Shells, the same ones Lester Nygaard (Martin Freeman) purchased with his socks and shotgun.