Halo 4's Spartan Ops season is heading towards a climax, with only three episodes left. A newly released trailer promoting next week's episode 8 shows just how dire the situation is getting as we approach the finale.
Prometheans have been assaulting the Infinity, leading the battles to slowly shift from primarily Covenant to new enemies. This episode, titled "Expendable," sees the fallout as the UNSC forces try to fight back the enemy and understand what they're after. It even shows the Promethens apparently abducting Dr. Halsey. The name has ominous overtones: Will the UNSC sacrifice one of its most brilliant (albeit rebellious) minds?