I watched a TV show the other evening and it was about the idea of what happens to everything when the 'end' comes?
As for the begining of time, well thats for other threads, lol. My question is this, if the universe keeps expanding the way it is, at what point does it go POP?
People keep saying the big bang happened and that from then until now and well into the future space as we understand it will keep expanding like a giant balloon, but giant balloons expand and pop, so again at what point will everything go POP?
Or - how big is the balloon in the first place?

If the universe expands indefinitely, I do percieve it as 'popping'

There are two theories about the end of our universe.

One is the Big Crunch in which the universe collapses on itself and the other is the big freeze. The big freeze seems to be the more accurate version from the knowledge we have today. Background radiation from the Big Bang has proven the expansion of the universe, therefore the planets are moving further and further apart. Naturally, if our planet moves too far away from the sun it will cause our planet to freeze ending all life form. What an optimistic thing to look forward to that is-- if our sun doesn't burn out first.

The big freeze isn't a theory about the end of the universe. It's about the end of all life on earth. If everything freezes the universe will still be here, only most planets will look like frozen eggs

I thought the Universe would just keep expanding, because it makes its own space with in space, if you know what i mean.

Actually, the Big Freeze theory is indeed about the universe's end.

The theory postulates that the universe will keep on expanding until everything will be pulled away from each other. Eventually, atoms themselves will break down into their parts, and the universe will just be foggy, cold, and lifeless.

Okay so I was off with the frozen eggs thing. But like you said "the universe will be foggy, cold, and lifeless." This is what I meant; the big freeze is about the end of all life, but the universe itself will still exist. It will just be very empty.
At least that's how I understand it

By defenition, the universe is everything in existence, so in theory the universe cannot "pop". You can't really compare the universe with a balloon, since the balloon pops thanks to certain properties, one of them is preassure. The universe does not suffer this preasure since as I mention above, it's everything in existence. I'll elaborate a bit more this topic, when I have more time to do so.

I've watched a program too. and it described that at the end the galaxies are too far away from each other and that the spaces between them is a literal spaces because not even photons the building blocks of atoms is/are already gone.

I think it's more apt to just get a hole in it and fly around randomly making a high-pitched ppffftttt noise.

(Sorry. I couldn't help myself)