I've managed to view recordings of the first two episodes of this series. I confess to being disappointed although there are some interesting aspects. The focus is on helping "ordinary people" (to use Hawking's phrase) comprehend some complex concepts. He enlists three so-called "ordinary people" for each episode and provides them with rather esoteric and unusual props with which to investigate deep questions.
On the topic of time travel, his message was that time travel to the past is impossible but to the future is possible. Alas, you can't go very far into the future and you have to travel rather far and fast to outer space and make to gain a few seconds. I admit the series is very creative in the way it tries to illustrate these points and that makes it worth seeing.
He was a bit more optimistic about alien life existing in the universe but not all that practical. Not too much philosophy yet.