There's nothing 'on television' right now. [=there are no programs that I would like to watch now]
I recognize your face. Are you 'on television'? [=do you appear in a television program?]
What is 'on the television' [='on TV', ('chiefly Brit') 'on (the) telly'] tonight?
(..) the chain of causality here. Must we? Event a- a beautiful woman stands naked in our shower. Event b- we drive halfway across town to retrieve a television set from the aforementioned woman's ex-boyfriend. Query- on what plane of existence is there even a semi-rational link between these events? (..)2007 TvShow: The Big Bang Theory Title: Pilot Season: 1 Episode 1
(..) and yet not so close as to cause perspiration in the summer, it's directly in the path of a cross-breeze created by opening windows there and there it faces the television at an angle that is neither direct, thus discouraging conversation, nor so far wide as to create a parallax distortion. (..)2007 TvShow: The Big Bang Theory Title: Pilot Season: 1 Episode 1