How do I change spartan ops episodes ?

I keep getting episode 1 chapters on search, I want to play episodes after it, in find game of course

Choose the ‘Play Chapters’ menu option a level higher. Not ‘Find Game.’

Matchmaking for Spartan Ops is only available for 5 developer-chosen chapters at a time. It changes each week on Mondays at 11:00 UTC.

Next week will be Episode 2: Artifact.