Sabrina learns that she's half-mortal, because her father is a witch and her mother is mortal, which explains why her powers didn't develop until she turned 16. However, her father and two aunts are full witches, which probably means that they have had their powers since birth. This tells us that, in this show, their magic powers are genetic.
The fourth outfit in the credits for this episode is a witch's outfit, complete with costume hat (which she will wear in "A Halloween Story"). Her comment is "This is so not me."
In her magic book, Sabrina's father tells her she can't meet her mother and if she does Diana will turn into a ball of wax. It was a way to discourage witches from marrying mortals. When he tells her that he said she couldn't see her in the next two years but her mother still turned into wax when Sabrina saw her years later, when she was in college.
When Sabrina uses her powers to turn Libby's drink over, the string used can easily be seen.
Zelda: Wait 'til Sabrina finds out what doors this will open for her. Hilda: Wait 'til she finds out you still get zits at 600 years old.
Libby: You did something to me, you sent me somewhere. It was small and it smelled like Hawaii.
Mr. Pool: I'm Mr. Pool. And I know you were hoping I was going to spend the day mispronouncing your names but instead let's jump straight into biology huh?
Jenny: Knock, knock. Sabrina: Who's there? Jenny: Brad. Sabrina: Brad who? Jenny: Brad Pitt. Is there any other Brad worth mentioning?
Sabrina: I hate being a witch! I just turned the most popular girl in school into a pineapple! Hilda: Why? Sabrina: Because it's the only thing you taught me how to do! Hilda: Chill. I can fix this. (grabs the butcher knife) Chunks or rings? Zelda: Hilda... there are other ways. Hilda: Wedges?
Zelda: Here is a present from your father. (places the magic book on the table in front of Sabrina) Sabrina: An old book, a black pot... Doesn't anyone shop at The Gap anymore? (reads title) "The Discovery of Magic". Why'd he give me this? (opens book up to the page with Edward Spellman's photo) Oh, that's why. This old magician looks just like my dad. Edward's Photo: Surprise! (Sabrina is taken aback) It is your dad! Happy birthday, Sabrina. Sabrina: Wow! Hallmark has gotten really high-tech. Can he say anything else? Edward's Photo: I'm not a hologram, honey. I'm just in a different realm. Sabrina: A different realm? I thought you were at the Toronto Midway Motor Lodge. Edward's Photo (to the aunts): Zelda! Hilda! Didn't you explain to her she's a witch? Hilda: She doesn't believe us! Sabrina (closes the book): Not this again. Look, I know you went to a lot of trouble to set this joke up, so, ha ha ha, now it's over. Hilda: No. It's just beginning. You are a witch. Zelda: With real magical powers. And now that you're 16, you can use them. And you wanted something from The Gap... Sabrina: So what are you saying? I'm not who I think I am? You're not who I think you are? And my father lives in a book? Hilda (to Zelda): Finally, she gets it. Sabrina: This is insane. (gets up) I'm going to my room. Come on, Salem. Salem (before Sabrina leaves the room): Can you wait till I finish my milk? Sabrina (walks back in): Did the cat just talk? Salem: Yes. And get this stupid hat off my head! Sabrina (freaked out): Oh my god! (runs out of the room) Zelda (after an awkward pause): I think we better let her father handle this. Ted? (the book floats up)
Edward (to Sabrina about her mortal mother): You see, there's a rule. If you set eyes on your mother in the next 2 years, she'll turn into a ball of wax. Sabrina (puzzled): What? Edward: It's the way they discourage mortal-witch marriages. Sabrina: So is that the reason you and Mom got divorced? Edward: Mmm... no. Sabrina: So, do you think maybe you could get back together? Edward: Mmm... no. That's another ship that's sailed.
Hilda: Now! Now! Be careful pointing your finger at people, it could be dangerous. Sabrina: You're pointing at me. Hilda I have the safety on.
Libby: You know, if you stink I'm not sure it's fair to blame the frog. Sabrina: Well at least I don't splash on aftershave to remind me of some boy who dumped me last summer. Libby: How'd you know that?
Sabrina: And I suppose my mom's a witch too. Hilda: I always thought so.
Sabrina: (While practicing her magic) Salem into apple... Salem: I think that's enough magic for one night.
Sabrina: (To her father) I don't want to be a witch, I want to be normal.
Sabrina: Oh look, you put Salem in a party hat. How cute!
Jenny (to Sabrina, about their frog): Let's name him. Tad. Tad Pole.
Sabrina: I love being a witch! I don't know what made the Council change their minds but I got to do the whole day over again, and now the teachers think I'm smart, the jocks think I'm cool. Oh and I'm going to the movies with Harvey and Jenny Saturday night. Woo-hoo! I'm normal! Gotta go tell the cat. (She runs upstairs to see Salem) Hilda: Teens. Zelda: What about them? Hilda: Just in general.
In the original 1996 movie, which led up to the series, Melissa Joan Hart is the only character who appears in both, playing the same character. Michelle Beaudoin, who plays Jenny in the series, plays Marnie in the movie. The aunts, played by different people in the movie than in the series, are more true to their Archie comic book roots: Hilda is the more stable, serious aunt and Zelda is the wacky aunt. Even Salem isn't voiced by the same person. The Spellmans live in Riverdale, not Westbridge. And Sabrina's parents are traveling on sabbatical (Sri Lanka is one of the places they visit), instead of being divorced.
There are two endings to this episode. In the first one Salem tells Sabrina how to use magic to get a glass of milk and in the second one Salem tries to tell the audience that they are under his control, but leaves when he hears a can opener. "Please be tuna." "Please be tuna."
There are different people playing the roles of Harvey, Zelda, and Hilda in the TV series. Marnie has a new name, but remains Sabrina's best friend.
Director Robby Benson has a literal "cameo" role as the talking photograph of Sabrina's father Edward.
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