Spartan Ops Episode 4 launches for Halo 4

It's a new week, which means a new set of co-op missions for Halo 4's Spartan Ops mode. This week's missions revolve around the discovery of the Sangeheili terrorist known as "The Didact's Hand" on Requiem. And for those of you who like her, Catherine Halsey makes another appearance in the preview trailer.

Also, this week's update swaps out Team Snipers for FFA Throwback in multiplayer, according to Halo Waypoint. FFA Throwback will include Oddball and King of the Hill free-for-all modes. There will be five maps for the two modes: Haven, Adrift, Complex, Solace, and Abandon.

If you haven't done enough killing of Forerunners or other Spartans, get to it. Oh, and here's the teaser for Didact's Hand co-op: