Lore fans have probably already sped through the first episode of Spartan Ops in Halo 4. You can get ready for a second dose of Spartan Ops coming next week, and 343 has teased the upcoming episode with a new trailer.
In the next episode, the artifact from Requiem takes control of the UNSC Infinity systems. The Spartans have to go planetside again to find a way to free the ship from the artifact's control. Check out the trailer below.