Halo 4's Spartan Ops mode will receive its third episode next week, which focuses on Dr. Catherine Halsey, an important character to the series' lore.
As seen in the trailer for Episode 3, posted above, Halsey is brought on board the Infinity to consult about an alien artifact the team uncovered in episodes past. The doctor, who is responsible for the Spartan soldier project, makes an appearance in the opening sequence to the main Halo 4 campaign.
Spartan Ops Episode 3 launches Nov. 19.
