Michael Daingerfeld, who plays the security guard Clark talks to in the mansion, also played Gordon Godfrey/Darkseid in Season 10.
Belle Reve in the comics is a maximum security prison in Louisiana for supervillains
The worker at the factory says "Let me go! You're crazy, I have no idea what you are talking about! Go away!" in Cantonese when Lex threatens him.
After her accident while horseback riding, Lana has to wear an Ilizarov Frame, a bone growth device, for her damaged leg.
Lionel calls Clark "Sancho Panza", who is the companion to the titular character in Don Quixote, in which Quixote goes on a delusional adventure fueled by his own imagination. Panza is his squire who obediently follows Quixote on his insane quest but never steers him towards reality.