If you want critics' takes on 'Watchers' (or anything called 'Watcher' or similar), the quickest gateway I use is Rotten Tomatoes and Metacritic — they aggregate critics so you can see the broad reaction at a glance. I usually open the review page, scroll past the score to read a few full reviews linked there, and check which ones are labeled 'Top Critics' so I know I'm getting established voices rather than a random blog. When I'm in the mood for longform critique, I follow links to places like RogerEbert.com, IndieWire, Variety, The Hollywood Reporter and The Guardian; those sites often dig into themes and filmmaking choices in ways short blurbs don't.
If the title you mean is a book like Dean Koontz's 'Watchers', my routine shifts a bit: Kirkus Reviews, Publishers Weekly, the New York Times Book Review, and sometimes Locus (for speculative stuff) are where I start. For older or obscure pieces, I dig into newspaper archives, ProQuest, or even library databases. And because I love hearing passionate takes, I also check Letterboxd for film/TV and Goodreads for books — those are user-driven but often link back to critic pieces or highlight interesting angles.
Final tip from me: don't just look at the score. Read a few perspectives — one rave, one lukewarm, one negative — and you'll get a feel for whether critics focus on the same things you care about (acting, pacing, themes, atmosphere). After a couple quick reads, you usually know whether to stream, buy, or skip.