Trivia: The lead monk at the beginning of the episode is named "Thelonious." This is a not-so-subtle nod to renowned jazz pianist Thelonious Monk.
Once More, With Feeling - S6-E7
Trivia: Hinton Battle, who plays the demon Sweet, is the most successful Tony Award winner, with three wins in the Featured Actor in a Musical category from three nominations. There have been other three-time nominees in the category, but they have won two or fewer of the three.
Trivia: While "Seeing Red" is commonly considered Amber Benson's last appearance as Tara, she actually appears (and is credited) in this episode as Tara's dead body.
Trivia: During filming, Sarah Michelle Gellar became very close with Michael Gershman, the lead cinematographer of the first five seasons, who became a father figure to her (she was estranged from her real father). They became so close that when Gellar got married in 2002, she asked Gershman to dance with her during the father-daughter dance. When Gershman passed away in 2018, Gellar posted a heartfelt tribute to him on her social media.
Trivia: In a very geeky milestone, this episode features the first use of the verb "Googled" to refer to an internet search on a scripted American television show. In the twenty years that have passed since this episode aired, saying "Googled" to refer to an internet search has become so common, over 80% of people polled use it regularly.
Chosen answer: Angel is saying that he is still jealous and Buffy recognizes that this is his way of saying he wishes that they could be together. That is why they both smile.