If a show is in its 5th season or something, is there a rule about waiting before apping from a new episode or season? For example, Dexter Season 7 is airing right now; would I be able to app from s7x03 a couple weeks after it airs or would I need to app the character from s6 to avoid spoilers?

I have no intention to app one, but would appreciate the clarification for future! Thanks!