It’s from an episode of ST: The Next Generation where they’re stuck in a time loop. When they realize they’re stuck in a loop, they say “So we could have seen this [presentation explaining the time loop] a dozen times already?”

The joke is different variations of that and seeing them a dozen, a hundred times. I think it’s just about played itself out, but you may still see a few coming through.

Posting about a time loop in c/Out of the loop

There’s the bones of a joke here somewhere…