Yes, the reference to Janus Cars is so obvious, so obvious that Sherlock needed a clue to get it. Why?

and wasn't the whole thing really about facing Boggarts? No connection there either.

No, because a punch wouldn't have killed him ;)

More like assault with a weapon. A punch, by definition, means with a fist.

It's not a punch; he hits him with the snowglobe.

With this finale, I felt like I was watching a different show, but the one I've been waiting for for three seasons. This episode struck just the right balance of quirk and character, something that's been sorely lacking as late as this season's beginning. I'm looking forward to season 4 now.

Every time something doesn't go a Rayburn way: "FUCK! FUCK!" [pounds fist] Meg finally got her turn this episode and I burst out laughing.