Translations:
-The scroll which Zhao finds in the library means 'Moon Spirit and Ocean Spirit' and 'Northern Water Tribe' (edit) Character Debuts: Koh (edit) According to the creators, Koh will return sometime during season 3. (edit) Hahn's attempt to defeat Admiral Zhao (whom he calls "Admiral Choi") fails drastically as he is thrown over the board. According to the DVD Commentary, the writers had forgotten about Hahn until Aaron Ehasz, head writer and writer of this episode, pitched the idea of Zhao tossing him overboard. (edit) According to the Avatar Escape From the Spirit World online event, the brown-haired woman's face that Koh possesses is a Southern Tribe woman named Ummi. She was the soon to be wife Avatar Kuruk, the last Northern Water Tribe native Avatar seen briefly in The Avatar State. On the day of their wedding, Koh pulled her into the Spirit pond, disappearing her away to the Spirit World to punish Kuruk for his past arrogance. (edit) Iroh knew that Yue had been touched by the moon spirit because after Zhao killed the moon spirit and everything around them turned black and white, Yue's eyes were still blue. (edit) The whirpool type move used by Master Pakku during the night is the same move used by Aang in The Avatar Returns. (edit) This episode aired in the UK on 27/10/06 (27 October 2006). (edit) Koh has many different faces. The ones that were shown include:

A female Noh mask — a white face with red lips and grey eye markings, which may possibly be his original face or the face of a geisha.

A bearded and mustached man's face, possibly that of the Avatar who attempted to kill Koh for stealing the face of his loved one due to when Koh shows this face.

The loved one's face —Ummi, a Southern Water Tribe woman with long wavy brown hair, brown eyes, and pink lips. This is the face of the wife of Avatar Kuruk, whose face was stolen by Koh as punishment for Kuruk's past arrogance.

A blue-nosed Mandrill's face. Most likely the face of the monkey that was outside of Koh's Cave.

An owl's face. Light brown feathers and emerald green eyes.

An old man's face, white mustache and blue eyes.

A blue oni mask.

A young man's face, brown hair and gray eyes. (edit) Princess Azula could be firebender in the opening theme. If you play the opening theme in slow motion, there is a point where the face of the firebender is temporarily shown. The firebender shown has many characteristics which are similar to Azula's. (edit) At the end of this episode Uncle Iroh tells Zuko that a man needs his rest. That was the second time he had said that. The first was in The Boy in the Iceberg. (edit) This marks the second time in the series Katara has come close to crying because Aang was captured by Zuko. (the first was in The Avatar Returns) (edit) According to Koh, one of Aang's past incarnations, 800 or 900 years ago, tried to kill him for stealing the face of a woman that the Avatar loved; the male face he used when speaking was probably the same Avatar he was speaking of, and the woman's face was the Avatar's loved one (edit) We learn what the spirit world really looks like. (edit) Constantly through the episode, you hear the music behind Iroh's "Four Seasons" song he was singing in The Waterbending Master. (edit) The spirit that Avatar Roku sends Aang to find is called Koh the face stealer. His body is that of a giant centipede, but his face is that of a noh mask. He is able to assume faces of his victims, and is a very ancient spirit. (edit) After Zhao dies, Zuko is left alone. He has almost nothing left:
His Crew: Possibly killed, or on the run
His Ship: Burned to shreads
All Their Food & Money: It's in the ocean
All Zuko has left is his uncle, and a small log ship. (edit) The ocean spirit's mortal form was shown in this episode. (edit) Fire Lord Ozai has recruited his daughter to help him with a "task," possibly to capture the Avatar and kill Zuko and/or Iroh. (edit) Zhao admits he knows Zuko is the Blue Spirit, and that he tried to have him killed because of it. (edit) This episode marks the second time Zuko and Zhao share a one-on-one battle. Although they have confronted each other and Zuko has come close to attacking Zhao out of anger numerous times over the series, this is the first time they've fought each other since their Agni Kai (fire duel) way back in The Southern Air Temple. (edit) Admiral Zhao dies in this episode, at the hand of the ocean spirit. (edit) This episode marks the second time Aang has saved Zuko. In The Blue Spirit, Aang decided to take Zuko with him instead of leaving him behind for Zhao's soldiers to capture him. This time, he saved him from dying in the midst of a snow storm at the North Pole. (edit) In the end Zuko decides not to go after Aang saying he just wants to rest. (edit) The panda bear (Hei Bai) from The Spirit World (The Winter Solstice, Part 1) makes another appearance in this episode. This time to help Aang get back to his world. (edit) When Aang travels to the Spirit World, he will initially reappear from it in the original spot that he was in when he left the physical world. Since Zuko moved his body from the oasis, Aang's spirit was forced to travel to where his body was. (edit) Apparently the spirits of the Avatar world are capable of assuming mortal forms, such animals and humans. The two koi fish in the oasis were the ocean (black with white spot) and the moon (white with black spot). (edit) True to Aang's prediction from Part 1, the Ocean Spirit helps him unleash a "crazy amazing spirit attack on the Fire Nation." (edit) Katara and Zuko fight again in this episode. This time Katara wins and even manages to defeat Zuko with one blow. She was probably so strong because the match took place at night and also there was a full moon that night. (edit) Not all Fire Nation soldiers are cowards as they have been portrayed in episodes such as Imprisoned. Several soldiers try to confront the Water Spirit, only to be effortlessly knocked aside. (edit) Katara will train Aang in the art of Waterbending until he masters it. (edit) Princess Yue sacrificed her life to save the Moon Spirit. As a result, she is now the spirit of the moon. (edit) After the battle, Pakku tells Katara that he will travel down to the Southern Water Tribe to help rebuild it. (edit) This marks the first time Iroh has fought other firebenders. He battled earthbenders alongside Zuko back in The Spirit World (The Winter Solstice Part 1), so overall this is the second time Iroh has fought in the series so far. (edit) Fire Lord Ozai considers his brother a traitor, his son a failure, but his daughter a prodigy. (edit) Ozai and Azula make their first appearance outside of a flashback. (edit) Enemy Debut: Princess Azula
This is the first mention of Zuko's sister. Princess Azula is the young woman in The Storm who was seen smiling at what happened to Zuko. It is also revealed she is a very skilled firebender. (edit) Iroh assists Aang and the others to save the moon spirit. This is the first interaction he has had with Aang, Katara and Sokka so far in the series (longer than two minutes). (edit) The reason Yue's hair is white is because as a baby she would have died but the moon spirit gave some of its life to her, changing her hair from brown to white. (edit) Iroh has been to the Spirit World, which explains why he can see spirit creatures. (edit) This is the second part of the two-part season finale. (edit)

Koh: Tui and La, your Moon and Ocean, have always circled each other in an eternal dance. They balance each other: push and pull, life and death, good and evil, yin and yang. (edit) Yue: There's no hope now, it's over.
Aang (enters the Avatar State): No, it's not over. (edit) Yue: Don't worry, Prince Zuko can't be getting to far in this weather.
Katara: I'm not worried they will get away in the blizzard, I'm worried that they won't. (edit) Arnook: The spirits gave me a vision when Yue was born. I saw a beautiful, brave young woman become the moon spirit. I knew this day would come.
Sokka: You must be proud.
Arnook: So proud. And sad. (edit) Sokka: They’re not gonna die in this blizzard. If we know anything, it’s that Zuko never gives up. They’ll survive, and we’ll find them. (edit) Yue: We shouldn't be doing this.
Sokka: What? We're walking. (edit) Fire Lord Ozai (to Azula): Iroh is a traitor, and your brother Zuko is a failure. I have a task for you.
(Azula sends out an evil smile) (edit) Hahn (On board Zhao's ship): Admiral Choi! Prepare to meet your match!
(Hahn runs toward Zhao but is quickly thrown over board by him) (edit) Aang (talking about Zuko): We can't just leave him.
Sokka: Sure we can! Let's go. (edit) Zhao: I am, a legend now! For generations the Fire Nation will tell stories about the great Zhao, who darkened the moon! They will call me Zhao the conqueror! Zhao the moonslayer! Zhao, the invincible! (Momo attacks Zhao) Get it off! Get it off! (edit) Sokka: Hey, this is some quality rope. (edit) Zuko (to Aang, still in the spirit world): I finally have you, but I can't take you home because of this blizzard. There's always something. Not that you would understand. You're like my sister. Everything just comes easy to her. She's a firebending prodigy, and everyone adores her. My father said she was born lucky; he says I was lucky to be born... I don't need luck, though. I don't want it. I've had to struggle and fight my whole life, and that's made me strong. It's made me who I am. (edit) Zhao: General Iroh. Why am I not surprised to discover your treachery?
Iroh: I'm no traitor, Zhao. The Fire Nation needs the moon, too. We all depend on the balance.
(Zhao does not release the moon spirit)
Iroh: Whatever you do to that spirit, I'll unleash on you ten-fold! Let it go now! (edit) Admiral Zhao (just after Zuko fired at him): You're alive?
Prince Zuko: You tried to have me killed! (blasts more fire at Zhao)
Admiral Zhao: Yes, I did. (as Zuko emerges from a cloud of smoke) You're the Blue Spirit. An enemy of the Fire Nation. You freed the Avatar.
Prince Zuko: I had no choice. (the fight continues)
Admiral Zhao: You should have accepted your failure, your disgrace. Then, at least, you could have lived! (edit) Princess Yue (in spirit form, flying down towards Sokka): I'll always be with you. (she leans down and she and Sokka kiss lightly; she then fades away) (edit) Prince Zuko (after Aang comes back from his visit to the Spirit World): Welcome back...
Aang: It's good to be back... (edit) Admiral Zhao (talking about capturing and destroying the moon spirit): We're going fishing. (edit) Uncle Iroh: I'm surprised Prince Zuko. Surprised that you are not at this moment trying to capture the Avatar.
Prince Zuko: I'm tired.
Uncle Iroh: You should rest. A man needs his rest. (edit) Aang (refusing to leave Zuko behind unconscious in the snow): If we leave him here, he'll die.
Sokka: Yeah, that makes sense. Let's save the guy who's constantly trying to kill us. (edit) Prince Zuko: Back for a rematch?
Katara: Trust me, Zuko, it's not gonna be much of a match. (knocks him out and buries him in snow with one blast) (edit)

Yue only has enough hair for her braids and hair loops, yet when she becomes the Moon Spirit, she suddenly has a cape of hair flowing behind her. (edit) While Aang is pleading with Zhao, Momo's fur reverses its colors. (edit) Before Yue begins her flashback, the wind shifts her hair ornaments, revealing her lack of ears. (edit) At the very beginning of the episode when Katara is fighting the boy, her animation isn't the greatest and her necklace is drawn wrong. the silver part is completely on the black strip, instead of its actual hanging state. (edit) As Hahn enters Admiral Zhao's ship he says, "Admiral Choi, prepare to meet your fate." consequently Choi in Korean means governor, high, superior, lofty or towering. (edit) When Aang goes into the spirit world, he walks towards Koh's cave. Half a second later, a monkey suddenly appears on a rock near the cave. (edit) When you see Yue as a baby, her hair is fairly long. Babies tend to have short hair after they are born, though in some cases they are longer. (edit) When Aang is jumping onto Hei Bai's back and is about to return from the spirit world, he appears to airbend to get onto his back, even though we know you can't airbend in the spirit world. (edit) Katara is able to see Aang's spirit as it returns to his body in this episode, but in The Spirit World (Winter Solstice, Part 1), Katara was unable to see Aang in his spirit form, even when he was standing right next to her. (edit) Princess Yue's eyelashes are black, but her hair and eyebrows were turned white by the moon spirit when she was an infant. Shouldn't they be white too? (edit) If the moon was destroyed at nighttime, then shouldn't it have been pitch black and impossible to see, rather than black and white? (edit)

The monkey seen mediating beneath the tree in this episode seems to be another allusion to Buddhism, this time being the tradition of trying to reach enlightment through mediatation. (edit) The sequence in which Pakku performs the whirpool type against a platoon of soldiers is based off a still-life of an unidentified past Avatar from the unaired pilot. The technique was also referred to as the "water snake", in accordance to the waterspout's constantly shifting movements. (edit) Koizilla
Despite its Miyazaki origin, the creators state on the audio commentary that they decided to nickname the Ocean Spirit's monster form "Koizilla", an obvious take on the Godzilla (Gojira) legacy.
(edit) When Aang stated in the previous episode that the spirits will unleash a "crazy amazing spirit attack on the Fire Nation," he was actually foreshadowing what would take place in this one. Aang hinted that the spirits would hault the Fire Nation siege, which is precisely what happened when he became one with the Ocean Spirit. (edit) Koh the Face stealer seems to based on Japanese traditional Noh masks used in acting, to imatate a face. (edit) Koh the Face Stealer may have been influenced by the Norse legend of the World Tree Yggdrasil. In (part of) the legend, a wise golden eagle lives in the treetop while in the roots lives Nidhogg, a giant serpent/worm/dragon creature that gnaws on the roots and has a taste for people. (edit) The pairing of Sokka (peasant) and Yue (princess) is close to the Disney's portrayal of Aladdin and Jasmine, which Yue did not like her suitor(s) and fell in love with a peasant, for who he was, not his title. The ride on Appa was very much like the "magic carpet ride" scene in the movie as well--as Yue had "never been outside the city" as Jasmine had never been "outside the palace." As well as Sokka being an adventurer, free to "go where ever he pleases." (edit) The water creature that comes to form when Aang becomes one with the Ocean Spirit is very similar to the "night walker" from the movie Princess Mononoke. The concept of a human attempting to kill a nature spirit also comes from the movie. (edit) The two fish (black with a white spot and white with a black spot) represent Yin and Yang. Yin and Yang are symbols from the Chinese religion Taoism, which puts a great deal of emphasis on the natural world and man's relationship with it, much like the relationships with the elements in the show. The Chinese martial art of Tai Chi, developed from Taoism. Tai Chi is portrayed as "waterbending" in the show and the fact that the waterbenders get their power from the moon is based on ieen, a Chinese word for water and moon working in harmony. (edit) Zuko's speech about hard work and luck is a favorite recurring speech of a very similar Yu-Gi-Oh! character, Seto Kaiba. (edit)