The action ramps up in episode 4 of Halo 4: Forward Unto Dawn.
Halo 4: Spartan Ops - Episode 10
Here's the tenth episode of Halo 4: Spartan Ops, created by Axis Animation.
Halo 4 - CG Intro
Digic Pictures have created this CG intro for Halo 4's single player campaign.
Halo 4 - Composing Worlds
This developer video for Halo 4 shows how the musical score was created for the upcoming sci-fi game.