Get ready for the most tense — and essential — Oscars night ever

Some predictions say this will be among the least watched Oscars ever; viewership has been falling in general, and in year of less racially diverse nominations, TV audiences tend to be down. But this could also be the tensest, most unhinged, most contentious Oscars ever. Which would also make it far more entertaining than the usual clubby Hollywood event. Some of the evening is at least slightly predictable, some of it remains a mystery. Could it become an Oscars with a record-low audience