Looking for this tv documentary title

I had been looking for the title of this TV documentary about the
cosmos I seen approximately 10-15 years ago.

Its started about blackholes.. then in one segment, the astronomers
zoom in to the nearby distant galaxies, then they take a look at our
neighbour galaxy, Andromedea, and surprised to see one supermassive
blackhole at its center. What really shocking, was they take look at
our Milkyway, and one supermassive one at the dead-centre. The segment
revolved around about how these supermassive blackhole become passive
after gulping up masses and finally managed to hold the galaxy
together.

In the following segment, it talk about these two galaxies were heading
to each other...

In the distant future, Andromedea and our Milkyway galaxy will merge as
one new galaxy.


Anyone know this documentary show I am talking about?

I need to view it again, probably get it from Amazon if I could know
the title.

Thank you very much for your time.

PS: I appreciate if you could forward your reply to my email
(separately, privately).