Act Three: Feeding Frenzy: Chapter Eighteen: North Star and Epilogue Summary

They convince Petkov to reveal the locations of the spheres, although he insists the Sentinel will not reach or disarm them in time. As they are ready to relay the information, a guard at the door is killed and Kowalski, Tom and Bane reveal themselves, having entered through yet another ventilation shaft. They are freed quickly and head for the Russian sub frozen into the ice below. Matt uses grenades to free it from the ice, and they begin boarding, but Craig finds them at about the same time as the Grendels enter the waterway from below.

Petkov decides to sacrifice himself for them and the child, letting the Grendels focus on him and telling Matt he has only one minute. Matt relays that to...