The fourth CG episode is out for Halo 4: Spartan Ops.
Halo: Nightfall - Official Trailer
The official trailer is out for the Halo: Nightfall series.
Halo 4 - Spartan Ops Episode 6
The sixth CG episode of Halo 4: Spartan Ops is now out.
Halo 4: Forward Unto Dawn - Episode 2
Here's the second episode of Halo 4: Forward Unto Dawn.