Endangered Species (X-Men)
Een cyclus is een verhaallijn die over meerdere albums loopt. Deze cyclus telt 18 albums.
2. The Uncanny X-Men 488 –
The Extremists, Part 2
3. X-Factor B21 –
The Isolationist: Part 1
6. The Uncanny X-Men 489 –
The Extremists, Part 3
7. X-Factor B22 –
The Isolationist: Part 2
10. The Uncanny X-Men 490 –
The Extremists, Part 4
11. X-Factor B23 –
The Isolationist: Part 3
13. X-Men (Marvel) 203 –
Blinded by the Light, Part 4
14. The Uncanny X-Men 491 –
The Extremists, Part 5
15. X-Factor B24 –
The Isolationist: Part 4
16. X-Men (Marvel) 204 –
Blinded by the Light, Epilogue