Good episode (I have a feeling we'll be saying this every week)!
I liked the story about the space whales leading the first explorers through the asteroid belt. A romantic sea shanty-esque feel to that.
Felt like the pacing was about to drag in the middle, but then it picked up again.
Did they explain what the kids job was?
Nice that the Doc mucking about with the water at the beginning had an actual purpose, which was explained and made sense, rather than just being something "FUN" and "ODD" as it might've been when he who shan't be named was in charge.
But Moffat's SCOT AGENDA continued with those comments about a separate Scottish ship! "Good for them!"