He looks at Spike disbelievingly and as he wishes up the chain, "An egg. That doesn't sound like one. Unless it's--"

Hatched something, of course. Spike seems to know a lot more than the Doctor does right now but he can put two and two together to figure out what that chain is for. Another thump and the fridge shakes, another to go with it and the door pops open... "Too late."

The door swings open wide. On the shelf, sitting there in the bottom half of the egg, a tentacled, grey-green blob with one unblinking eye. It's vaguely a face, and where the mouth should be is a little electronic grill, because reasons.

"ARRGGHH. HUUURRR"

Not only is Spike getting to see one very curious thing, but here's another: the Doctor has gone stock still and white.