Watching TV shows online for free is legal and hustle free if you get a good website. I can suggest you few like Tubi, pluto tv, yidio etc. However, my personal favorite is Tubi. You can watch show without even signing up on it. Tubi allows you to establish a favorites watch list and resume viewing across several devices. It offers a simple and straightforward UI with well defined categories such as TV Dramas, TV Comedies, Reality TV, and Crime TV.