Starting today, the first season of Spartan Ops starts with new locations, missions and stories.
Yes, until February 24th you'll get free cinematic episodes and missions.
See Fireteam Crimson Spartan Thorne search on Requeim planet.
Plus combat with vehicles and man to man with Prometheans and Convenant groups.
Free to play is Spartan Ops: Season One episodes 1 to 5.