The surprising answer is: nobody knows. Physicists, despite trying for almost a century to rule it out, have so far failed. The known laws of physics do not forbid time travel. In fact, they appear to make it easy - at least in principle.
Tony Hall has recognised that this model is unsustainable, old fashioned and just wrong. In an increasingly fragmented media world none of us can rely on audience brand loyalty, we have to always do the very best we can.
Steve Moffatt said that television was better than cinema. And that's fighting talk. He then went on to give five reasons why this was the case. Well, as they say in the US, 'straight back at ya' - here are more than five reasons he's wrong:
Dust off your party clothes, crack open the bubbly and fire up the party poppers because we are celebrating at Food Tube HQ this week. That's right, we've got 500 thousand subscribers. This is very exciting. So exciting that we made a video about it.