Plot hole: Throughout the series, Sandy always refers to Daria as "Quinn's cousin" or "that girl that lives with Quinn" or other random titles for Daria (not knowing that Daria is Quinn's sister). Although Quinn admits to Sandy that Daria is really her sister in one of the last episodes of the final season, in this first episode of the series, Sandy is in the crowd watching Daria give a speech and Daria reveals to everyone Quinn is her sister (embarrassing Quinn). Sandy should already know they're sisters.
Daria (1997)
1 plot hole in season 1
Starring: John Lynn, Julian Rebolledo, Tracy Grandstaff, Wendy Hoopes
Continuity mistake: When Daria is on the couch with her dad she's holding a mug but the next shot it's a glass. (00:15:39)
Esteemsters - S1-E1
Trivia: This debut episode is the only time any reference to Beavis and Butt-Head (where Daria was originally first introduced before spinning off into her own series) is mentioned. Helen mentions the town of Highland (where B&B took place) in one line (without mentioning B&B by name). No other reference was ever made.
Question: Whenever Kevin talks to Mack, Kevin calls him "Mack Daddy." Mack always responds with "Don't call me that." What is the reason Mack doesn't like to be called "Mack Daddy"?
Answer: "Mack Daddy" was a 90s phrase meaning "Ladies man," and Mack simply doesn't like the stupid nickname.
Brian Katcher