For most of this latest series, I was bored, and I know I'm not alone. The acting and directing have been excellent, the writing so far as dialogue and pacing has also been quite good, but the show has felt like it's becoming a bit old hat.
The surprising answer is: nobody knows. Physicists, despite trying for almost a century to rule it out, have so far failed. The known laws of physics do not forbid time travel. In fact, they appear to make it easy - at least in principle.
Doctor Puppet is a series of stop motion animated shorts featuring characters and concepts from the sci-fi series ... "We are working on episode 6 and it will premiere at the end of August. We're actually doing something really different and exciting".