I created this image based only on the words of your show, where Hawking described the universe as a balloon. Here the galaxies are arranged within a balloon shape. This shows many galaxies within a balloon arrangement, in 2D. The galaxies are attached to the outside of the balloon, with variable offset from the surface. If you studied it carefully, or statistically, you might notice increased density of galaxies around the edges; it looks denser because of the overlap of galaxies at the edge of the balloon.
2D is the same way we see the night sky because our eyes aren't far enough apart to see space in 3D. But what if we could see a balloon structure in 3D? We get some of the effect if we change the scale so we can see the whole "universe" at once. You get even more of the effect if you put it in motion, because we can track, even in 2D.
I have rendered it spinning around in 2D, but your upload system doesn't support the file format (Quicktime; < 14MB). When you watch it moving, even though it is only 2D, you begin to see that no galaxies are present in the middle. The balloon is hollow.
Alternatively, you can render in 3D, as in the second image set, which requires a 3D viewing system. Again, the effect is much better if it is in motion.
We might also render the same "universe" as seen from our position on earth in order to highlight the difficulty we have in seeing depth in something so large as space, and where the nearest objects are lightyears away. Parallax requires separation of the viewing position, and our eyes are evolved to view things that are important to us here on earth, like food, lions, etc. We are in essence evolving better viewing systems when we look at the universe though wider eyes, giant telescopes separated by miles here on earth, or astronomical units if we take pictures at different points in time (at opposite ends of our orbit around the sun is the maximum we can achieve here on earth). These images give us a sense of a hollow universe as if we had eyes as wide apart as the entire universe.