The cat makes quantum physicist sense which is to say none. I think it was supposed to be dead throughout this episode and Lee tripping over the food bowl was all he actually saw of it until he opened the bag, all the rest of the cat scenes were supposed to be in Romo POV. But I think they screwed up on when or how the cat dies because it definitely had scenes with Tyrol in season three when he saw it even though Romo wasn't there. Unless that's a cylon thing. It's just possible that this was covered in the freakout exposition but I wasn't really paying attention being too busy (like you) thinking this is test/any minute now they're all going to wake up or Angelus will start laughing.

In conclusion, Dr Who was good tonight and next week is another day.