There's plenty of episode synapses available everywhere for every show. You don't have to watch them, just have to read them

I've stolen places from different shows and plot beats from other shows quite a bit since I started DMing about a decade ago

Only recently did someone catch on that the location (the dungeon they delved into) was stolen from a show (well, more "heavily influenced" by a show (think someone gave a elevator pitch for a location and I built from that)) though no one has caught on yet that they've been exploring Idaho now for 2 years. I've even laid maps down on the table for people to look over and no one's caught on yet.