In a massive reveal, the Colossus is revealed to be a giant starship rather than just a stationary platform. It launches from the water of Castilon into space to escape the First Order.
Kazuda Xiono watches in horror as Starkiller Base destroys his homeworld, Hosnian Prime, presumably killing his family and friends. [S1E19] No Escape Part 2
The episode picks up immediately after the destruction of the Hosnian system. In a massive reveal, the Colossus is revealed