- Absentee Actor: Subverted by Gordon's death late in the final season, since Scoot McNairy still appears in every remaining episode through flashbacks and in-universe archival footage.
- Acclaimed Flop: The show performed strongly with critics, but a niche subject matter crossed with Darkness-Induced Audience Apathy quickly sank the ratings lower than previous one-and-done AMC shows Rubicon and Low Winter Sun. However, unlike those two shows, Halt and Catch Fire received three additional seasons.
- Actor Allusion:
- Both Scoot McNairy and Kerry Bishé were portrayed as husband and wife in the 2012 film Argo, a period piece set during the 1979 Iran hostage crisis.
- In "10Broad36," some of Cameron's guys were trying to unscramble a cable signal. It didn't work out, but they say they could see "half a boob" while watching Cat People. Annette O'Toole appears in this episode as Donna's mother, and also starred in Cat People (topless, to boot).
- In "Tonya and Nancy", Cameron asks Bosworth if he came from a line of trailer folk. He replies she's not far off.
- Blooper: In the scene where Gordon and Joe decompile the IBM PC BIOS, Gordon demonstrates how his LED breadboard works; however, he states that the hex digit "B" is represented as "two on, one off, one on" note , which is actually the hex digit "D". He then correctly states that the hex digit "E" is "three on, one off" note
- California Doubling:
- While the first two seasons were set in the Silicon Prairie of the DFW Metroplex, the show is filmed in Atlanta, Georgia. In particular, Atlanta's tallest skyscraper, the Bank of America Plaza, doubled as the headquarters for Westgroup Energy.
- In Season 3, the setting moves to Silicon Valley. Most of the filming remained in Georgia; however, scenes with Joe at the Golden Gate Bridge were shot on location.
- Dye Hard: Originally a blonde in the first two season and half of Season 3, by the end of Season 3, Cameron is a brunette with long hair.
- Fake American: Canadian-born Mackenzie Davis plays Texas native Cameron Howe.
- Friday Night Death Slot: The fourth and final season aired on Saturday nights, though it was already announced that it would be the last.
- Irony as She Is Cast: Mackenzie Davis plays coding prodigy Cameron Howe, in real life Mackenzie revealed that she isn't good at typing.
- Out of Holiday Episode: A season 3 episode takes place during the 4th of July weekend, however the episode aired three months later in October.
- Playing Against Type: In a Q&A with Toby Huss, he states that the most rewarding part of his role as Bosworth was "[not] playing a dipshit".
- Playing Gertrude: Kerry Bishé (born in 1984) is only 13 years older than Kathryn Newton (born in 1997), the latter of whom portrays a teenaged Joanie in Season 4.
- Real-Life Relative: In the pilot Haley and Joanie Clark are played by sisters Lillian Ellen and Maggie Elizabeth Jones.
- In season 4's "Who Needs A Guy?" Alana Cavanaugh's actual sister Farah plays the younger version of Haley as Alana outgrew the role.
- Time-Shifted Actor: Due to the Time Skip at the end of Season 3, Haley and Joanie Clark each had three different actresses. In the pilot, real-life sisters Lillian Ellen and Maggie Elizabeth Jones portray Haley And Joanie, Alana Cavanaugh and Morgan Hinkleman portrayed Haley and Joanie as children respectively in the first 27 episodes while Susanna Skaggs and Kathryn Newton take up the roles as teenagers in the final 12 episodes of the series.
Trivia / Halt and Catch Fire