Complex sentence: They return to Alpha, where their superior, frosty Commander Filitt, informs them the center of the station has been infected by an unknown force, rendering it highly toxic, that troops sent into the area have not returned, and that the infection is spreading.
Split into simpler sentences: They return to Alpha, where their superior, frosty Commander Filitt, informs them the center of the station has been infected by an unknown force, rendering it highly toxic. Troops sent into the area have not returned, and the infection is spreading.