Right now, all that does concern me is getting Sabretooth back. Now, what if I told you, Agent Marrow, that you would be the Agent I'm assigning to bring him back... by any means necessary? What would you say to that? 
Appearing in "The Underground: Part 4"
Featured Characters:
Supporting Characters:
Antagonists:
Other Characters:
- Morlocks (Appears on screen)
- Ape (Appears on screen)
- Caliban (Appears on screen)
- Callisto (Appears on screen)
- Masque (Appears on screen)
- Sunder (Mark Hallett) (Appears on screen)
- Sabretooth (Victor Creed) (Appears on screen)
- Marauders (Mentioned)
Locations:
Items:
Vehicles:
Synopsis for "The Underground: Part 4"
- Synopsis not yet written
Notes
- Ironically, none of the five Morlocks shown on the screen died in the Mutant Massacre. More irony would be that Ape died at Neverland from The Director's concentration camps for mutants.