Spartan ops mission availability

[Monkeyrazzar]

I know that spartan ops will be released in a tv series like manner, and i have a concern i would like to put to rest. Will you be able to play spartan ops missions after a new episode or season is released? A new chapter is released will i be able to replay/ watch the cinematic and play the missions from the previous chapters or are they gone to me forever? Same goes for seasons, when a new season is released, can i still go back and do the previous seasons missions and cinematic's, or will it be locked? If any one knows the answer please let me know, thanks

 

Sean