The third episode has been released for Halo 4: Forward Unto Dawn.
Halo: Nightfall - Official Trailer
The official trailer is out for the Halo: Nightfall series.
Halo 4: Spartan Ops - Episode 10
Here's the tenth episode of Halo 4: Spartan Ops, created by Axis Animation.
Halo 4: Forward Unto Dawn - Episode 2
Here's the second episode of Halo 4: Forward Unto Dawn.