В сезонах 3-5 некорректный порядок серий. Ниже в соответствии с сюжетом. Источник: https://www.fatherly.com/entertainment/original-xmen-cartoon-how-to-watch-what-order
Season 3 1. Out of the Past I 2. Out of the Past II 3. Phoenix Saga I 4. Phoenix Saga II 5. Phoenix Saga III 6. Phoenix Saga IV 7. Phoenix Saga V 8. No Mutant Is An Island 9. Obsession 10. Longshot 11. Cold Comfort 12. Savage Land, Savage Heart I 13. Savage Land, Savage Heart II 14. Dark Phoenix Saga I 15. Dark Phoenix Saga II 16. Dark Phoenix Saga III 17. Dark Phoenix Saga IV 18. Orphan’s End 19. Love In Vain 20. The Juggernaut Returns 21. A Deal with the Devil
Season 4 1. Sanctuary I 2. Sanctuary II 3. Xavier Remembers 4. Courage 5. Secrets Not Long Buried 6. Nightcrawler 7. One Man’s Worth I 8. One Man’s Worth II 9. Proteus I 10. Proteus II 11. Family Ties 12. Bloodlines 13. The Lotus and the Steel. 14. Weapon X, Lies, and Videotape 15. Have Yourself A Morlock Little Christmas 16. Beyond Good and Evil I 17. Beyond Good and Evil II 18. Beyond Good and Evil III 19. Beyond Good and Evil IV
Season 5 1. The Phalanx Covenant I 2. The Phalanx Covenant II 3. Storm Front I 4. Storm Front II 5. The Fifth Horseman 6. Jubilee’s Fairy Tale Theatre 7. Old Soldiers 8. Hidden Agendas 9. Descent 10. Graduation Day
Season 3
1. Out of the Past I
2. Out of the Past II
3. Phoenix Saga I
4. Phoenix Saga II
5. Phoenix Saga III
6. Phoenix Saga IV
7. Phoenix Saga V
8. No Mutant Is An Island
9. Obsession
10. Longshot
11. Cold Comfort
12. Savage Land, Savage Heart I
13. Savage Land, Savage Heart II
14. Dark Phoenix Saga I
15. Dark Phoenix Saga II
16. Dark Phoenix Saga III
17. Dark Phoenix Saga IV
18. Orphan’s End
19. Love In Vain
20. The Juggernaut Returns
21. A Deal with the Devil
Season 4
1. Sanctuary I
2. Sanctuary II
3. Xavier Remembers
4. Courage
5. Secrets Not Long Buried
6. Nightcrawler
7. One Man’s Worth I
8. One Man’s Worth II
9. Proteus I
10. Proteus II
11. Family Ties
12. Bloodlines
13. The Lotus and the Steel.
14. Weapon X, Lies, and Videotape
15. Have Yourself A Morlock Little Christmas
16. Beyond Good and Evil I
17. Beyond Good and Evil II
18. Beyond Good and Evil III
19. Beyond Good and Evil IV
Season 5
1. The Phalanx Covenant I
2. The Phalanx Covenant II
3. Storm Front I
4. Storm Front II
5. The Fifth Horseman
6. Jubilee’s Fairy Tale Theatre
7. Old Soldiers
8. Hidden Agendas
9. Descent
10. Graduation Day