The latest Halo Waypoint post from 343 Industries lays out the studio's Halo 4 content release plans for the coming weeks, running through late January and early February. The 10-episode arc of Spartan Ops releases concluded with episode five at the tail end of 2012, but the series will pick up again on January 21, 2013 with episode six.
Also coming on that day is a new playlist, tentatively titled "Forge Test," that rotates through small Forge maps (Relay is cited as an example). Episodes seven and eight of Spartan Ops will follow on January 28 and February 4, respectively. Those two weeks will also bring additional playlist unlocks, and all three weeks will see more Specializations unlocking for all players.
You can hit the jump for the full rundown of what's coming.