- Actor-Shared Background:
- Paul Giamatti went to Yale, and his father Angelo Bartlett Giamatti was the Yale president from 1978 to 1986.
- Asia Kate Dillon quietly came out as non-binary in 2015 and removed all gendered pronouns from their biography, and then got cast as the first non-binary character on American television.
- Dan Soder is also a wrestling fan and a native of Aurora, Colorado.
- Cast the Expert: Chuck's wise and well-spoken Brazilian Jiu-Jitsu coach is played by John Danaher, a famously wise and well-spoken Brazilian jiu-jitsu coach.
- Celebrity Paradox:
- The Wire gets quoted during "The Oath", and that show, like Billions, happens to feature David Costabile.
- "Flaw in the Death Star" has an extended quote and parallel to the film version of L.A. Confidential that relies on referencing the Night Owl Massacre. David Straithairn played Pierce Patchett in the film and plays "Black" Jack Foley in this show.
- "Kompenso" has Bobby and Lara bring up Highlander in conversation. Clancy Brown played The Kurgan in the film and plays Jock Jeffcoat in the show.
- The Danza: A playful partial example that comes up in interviews: Dollar Bill Stern is played by Kelly AuCoin.
- Diagonal Billing: For Giamatti and Lewis.
- Dueling-Stars Movie: The show is an epic feud between Giamatti and Lewis.
- Fake American:
- Fake Russian: John Malkovich as Grigor Andolov.
- Fan Community Nickname: Billionaires.
- Playing Against Type: David Costabile, known for playing mild-mannered characters in Flight of the Conchords, The Wire and Breaking Bad, here plays the madcap, scenery-chewing Wags.
Trivia / Billions