Writer:	Jeannine Renshaw, Jeannine Renshaw, David Greenwalt
Director:	R.D. Price
Star:	David Boreanaz (Angel),  Charisma Carpenter (Cordelia Chase),  Alexis Denisof (Wesley Wyndam-Pryce)
Recurring Role:	Elisabeth Rohm (Detective Kate Lockley)
Guest Star:	Patience Cleveland (Nun),  Ashley Edner (Stephanie Anderson),  Jesse James (Ryan Anderson),  Jerry Lambert (Rick The Clerk),  Will Kempe (Seth Anderson),  Katy Boyer (Paige Anderson),  Anthony Cistaro (Ethros Demon)

This episode scored a rating of 4.7/7 in the overnight Nielsen ratings, ranking 5th out of 16 WB shows for that week. (edit) Wesley: A father doesn't have to be possessed to terrorize his children.
This episode foreshadows the events of "Lineage" (5x07) in which Wesley finally confronts his father. In this episode, several references to their relationship are made. The demon, while posessing the boy, goads Wesley with references to his poor relationship with his father. (edit) It could be said that this episode is a tribute to the movie The Exorcist, which it strongly resembles both in concept and in content. (edit) You'll note the spelling of Magick with a "k." Those who are actual Witches (in other words, those who practice the religion of Wicca) spell Magick with a "k" to separate real Magick from that which you might see at a magic show. (edit)

Wesley: Angel, before we go any further, I just want to assure you, inasmuch as we'll be fighting side by side... what that demon said before--
Angel: I know you're not planning to kill me, Wesley. But you're willing to, and that's good. Now come on. (edit) Ethros Demon: I know you bring death. I do not fear it. The only thing I've ever feared is in that house. (edit) Wesley: Hello, Sister? Good evening. Sorry to disturb your prayers. I hope we didn't make you lose your place.
Nun: Not at all. How can I--(turns toward Angel) You would come into a place of worship?
Angel: I'm not what you think.
Nun: No? (moves her cross toward Angel's hand and he recoils)
Angel: Okay. Yeah, I am. (edit) (regarding Angel's brownies)
Paige: What's your secret, Angel?
Angel: I use... chocolate. Which why they're brown. Which gives them their name... brownies. (edit) Seth: What are you laughing at?
Stephanie: Angel's funny.
Seth: Yeah? He hides it well. (edit)

When Ryan is trying to kill his mother in Angel's apartment, Angel runs down the stairs trying to conceal his laughter. When Wesley is holding a cross at Ryan and is spouting Latin, Angel bursts into laughter and tries to hide it by putting his head down. (edit) Earlier in the episode Stephanie's windows have bars, but later when Angel rescues her from the fire, the bars are gone. (edit)

Title: I've Got You Under My Skin
An obvious allusion to the Cole Porter song of the same name, first performed in 1936 and which has been recorded by a huge number of artists. The title is used a little more literally here! (edit) Angel: I made brownies.
The brownies laced with "eucalypsis powder" which invoke demon conniptions are surely a reference to the popularity of brownies containing everyone's other favourite herbal product, as famously described in the cookbook of Alice B. Toklas (and further referenced in the Peter Sellers movie named after her). (edit) Cordelia: I'm wondering if I should put plastic down. Angel, are you expecting any big vomiting here? Because I saw the movie.
The movie is The Exorcist starring Max Von Sydow and Linda Blair. There are numerous scenes in the movie where Linda's character spews copious amount of vomit during the exorcism. (edit) Wesley: You've heard of Lizzie Borden? She killed her parents with an axe?
Lizzie Borden was the daughter of Andrew Borden and the family was quite wealthy. In August of 1892 Andrew Borden and his wife were brutally murdered with an axe. Lizzie Borden became the prime suspect and was sent to trial. The case against her was circumstantial and she was acquitted.
Most people in the town felt that she had done it but was acquitted because of her status and the belief that no lady could be capable of doing such a thing. (edit) Cordelia: ...The whole thing needs a rating system.
(When referring to the violence in children's nursery rhymes) A campaign lead by Al and Tipper Gore in the 80s created the Parental Advisory labels for music. Years later another battle was waged on Capital Hill to label all television programs with a rating system. At the same time some fanatical people began demanding ratings for websites. Now some advocates are complaining that certain books are too violent for children, and should contain a rating system. Cordelia's comments are an obvious lashing out (by the writers or producers) at the overuse of the rating system. (edit)