Plot hole: The man the crew find stampeded to death had been lying in the road for a year, yet he had not began to decompose. (00:17:50)
Plot hole: In the last series, a point was made that the time drive is not a teleporter, so can only send them backward and forward in time in the one location (Deep Space). So in this episode, how can they now travel to Earth with the same device?
Suggested correction: With the merging of the two universes, the time drive ended up with the faster-than-light drive from the other universe (which is also how Starbug ended up bigger).