AH! Sorry got busy, for your previous question - and you likely realized this - you DO still have to upgrade the playground to reach unlock the higher scenes (even on later playthroughs). All thralls have at least 3 scenes with images and 2 scenes with just text.
Tissimo, as usual, is acting like a problem while in the playground but he does have equal chance of having his scenes come up. My suggestion, which you may have done - don’t get the other thralls to heighten the chance of seeing his scenes.
And yes! If you watch an entire season of one of the original SFW shows you unlock a whole avalanche of TV based content in the game. Some shows have achievements tied to them for watching all the episodes of that show.
There shouldn’t be an achievement for beating the guardians AND watching TV. Those should be separate.