I'm assuming you're referring to the "BP TV 2021" which could be related to various things such as a specific TV model, a TV show, or perhaps a product launch. However, without more context, it's challenging to provide a precise guide.

Season 4 follows Ambrose as he travels to Maine for a recuperative getaway with his partner, Sonya (Jessica Hecht). His peaceful retirement is cut short when he is recruited to investigate a tragedy involving a local island family, leading him into a web of paranoia and mystery.