No grade means no reviews are available for that episode. All grades are averaged.

#Book 1: WaterStaffUsersOverall
101The Boy in the IcebergABB+
102The Avatar ReturnsA+B+B+
103The Southern Air TempleB+B+
104The Warriors of KyoshiB-B-
105The King of OmashuC+C+
107The Spirit World (Winter Solstice, Part 1)A-A-
108Avatar Roku (Winter Solstice, Part 2)B+A+A-
109The Waterbending ScrollCC+C
111The Great DivideDC+C-
112The StormAA
113The Blue SpiritB+B+B+
114The FortunetellerBB+B
115Bato of the Water TribeBB
116The DeserterB-B-
117The Northern Air TempleC+D+C-
118The Waterbending MasterB+AB+
119The Siege of the North, Part 1A-AA-
120The Siege of the North, Part 2AA+A
#Book 2: EarthStaffUsersOverall
201The Avatar StateA-A+A
202The Cave of Two LoversB+B-B
203Return To OmashuB-B-
204The SwampC+C+
205Avatar DayB-B-
206The Blind BanditAAA
207Zuko AloneA-AA-
208The ChaseC+A-B+
209Bitter WorkB-B+B
210The LibraryB+B+
211The DesertAB+A-
212The Serpent's PassA-A-
213The DrillB+B+
214City of Walls and SecretsA+A-A
215The Tales of Ba Sing SeABB+
216Appa's Lost DaysB+A+A-
217Lake LaogaiB-A-B+
218The Earth KingA-AA-
219The GuruAAA
220The Crossroads of DestinyA+A+
#Book 3: FireStaffUsersOverall
301The AwakeningB+B+
302The HeadbandC+CC+
303The Painted LadyBB
304Sokka's MasterAA-A-
305The BeachB-B+B
306The Avatar and The FirelordAA
307The RunawayA-A+A
308The PuppetmasterA+A-A
309Nightmares and DaydreamsBFD+
310The Day of Black Sun, Part 1: The InvasionA+C+B+
311The Day of Black Sun, Part 2: The EclipseA+A+
312The Western Air TempleA-AA-
313The Firebending MastersBB
314The Boiling Rock, Part 1B+B+
315The Boiling Rock, Part 2A-A-
316The Southern RaidersB-B-
317The Ember Island PlayersA-A-
318Sozin's Comet, Part 1: The Phoenix KingBB
319Sozin's Comet, Part 2: The Old MastersB+B+
320Sozin's Comet, Part 3: Into the InfernoAA
321Sozin's Comet, Part 4: Avatar AangB+B+