If you saw the same program I saw, then you would have seen both Bob Bakker and Jack Horner (The top 2 bigwigs in palaeontology) come on afterwards and explain why it's bunk.
And the Asteroid hypothesis has been debunked since 1986 when Bob Bakker published The Dinosaur Heresies
Here's two good reads on the subject
Great Balls of Fire: Has Science's Doomsday Scenario bitten the Dust?
Impact Winter in the Global K-T Extinctions: No Definitive Evidences
You won't find too many palaeontologist in favor of the Asteroid hypothesis, the promoters are mostly Geologist, Physicist and Astronomers who like their face time in front of the media (and trips to Cancun) . And unfortunately many of the pro-Asteroid group has behaved worse than the Creationist.
For example see the link I posted about how Iridium is missing from the Chicxulub crater itself!!!!!
Now the evidence this guy found clearly overwhelmingly debunks the Asteroid theory, yet this guy blatantly just dismisses it.
Quote right from the conclusion in the paper
If we exclude the extremely implausible assumption that the K/T boundary is not related to the Chicxulub impact event,
Like Hey!!!, who says you can do that? That's not science. You can't just exclude conclusions because you don't like it.
Here's another example of Pro-Asteroid scientist playing tricks