To Dare Dominion (2) - S1.E55

Terror follows the wandering vortex, attempting to bring it back under his control, while John manages to escape from Claw. The other Centurions, still looking for Dominion, come under attack by their own weapon systems, which are transformed into creatures by the vortex's alteration of reality. Crystal beams them to Skyvault, leaving John still on his own in Terror's Arctic base. John finds a transmitter and contacts Skyvault, but the co-ordinates are unstable as the position of Dominion is not stable anymore due to the vortex. Crystal is able to beam the other Centurions to Dominion, where they meet up with John, who tells them that he still has to deal with his old enemy Claw. As John fights Claw to the finish, the remaining Centurions must figure out a way of destroying Terror's vortex before all of reality is destabilized.

Science Lesson: Continental drift by Crystal.