One other thing I was reminded of: the Doctor's talk to Merry about the atoms of the universe reminded me of Delenn's "we are starstuff" speech in Babylon 5. Of course, it's partially that the Doctor talks to children as if they're adults, and Delenn talks to Sheridan as if he's a child, but, you know. I thought that was lovely.

Yes, yes. I loved Cross' speech and Matt Smith's delivery - adored the nod to Carroll - but failed to notice how it harks back to the speech of Delenn's. One of my favourite moments in B5.

And I'm the 'loved this episode' camp.