SJS,
Rav Miller ZTV’L stated that television falls into the category of Seforim Hachitzonim. The Mishna in Sanhedrin discusses Seforim Hachitzonim (which is apikorsus) and states that one who utilizes it has NO chelek (not a ”reduced chelek”) in Olam Haboh.
One can look up the Mishna for the full ramifications.