Appearing in "Sins of the Past: Part 4 of 4"
- Ahab (Roderick Campbell) (Death)
- Transian Armed Forces
- President Constantin
- Numerous unnamed others
- Mutant Liberation Army (First appearance) (Past) (Unnamed)
- Cable (Nathan Summers) (Mentioned) (Deceased)
- Gheorghe (Constantin's son) (Mentioned) (Deceased)
- Rachel Summers (Recap)
- Mother Askani (Rachel Summers) (Mentioned)
- Hounds (Mentioned)
- Bloodstorm (Ororo Munroe) (Mentioned) (Deceased)
- Mimic (Calvin Rankin) (Mentioned) (Deceased)
- X-Men (Mentioned)
- President Nicolae Brancoveanu (Mentioned) (Deceased)
Races and Species:
- Prime Marvel Universe (Main story and recap)
- Earth-4935 (Behind the scenes)
- Domino's flying van (Destruction)
- PAC-RAT II
Synopsis for "Sins of the Past: Part 4 of 4"
- Synopsis not yet written
• Ahab has returned to exterminate X-Force!
• What twisted scheme is Ahab conducting that has attracted the attention of X-Force?
• The team has begun to put the pieces together, but will they figure it out in time to stop mass genocide?
- The cover teases the War of the Realms event in April 2019, as "coming in 1 month."