During the Battle of Io, protomolecule hybrid soldiers were launched from the moon and towards Mars. Jim Holden took the Razorback and boarded the King in order to retrieve the remote codes that would reactivate transponders thus allowing them to be located and identified. After fighting his way to the CIC together with Larson, killing Nguyen in order to get the codes, Holden left Larson behind. Larson volunteered to do so knowing that his EVA suit had been compromised. Larson remained behind and pressed the self-destruct button, destroying the ship.