The fourth CG episode is out for Halo 4: Spartan Ops.
Halo 4: Spartan Ops Extended Behind the Scenes
343 Industries and Axis Animation talk about creating the unprecedented Spartan Ops content for Halo 4.
Halo 4 - Spartan Ops Episode 6
The sixth CG episode of Halo 4: Spartan Ops is now out.
Halo 4: Forward Unto Dawn - Episode 3
The third episode has been released for Halo 4: Forward Unto Dawn.