The only three things I know about London are:
1. They have a bridge that's falling down, my fair lady.
2. Dangermouse lives there.
3. When people with an accent say "London" I always think they said "Orlando".
So I was a bit baffled.
Perhaps you were too. Or maybe you are baffled by the Orlando thing. Who cares.
Anyway, there is no need to be. The Tube is a nickname for the subway system in London.
Yep. You just watched that.
It's the second largest metro system in the world behind the one in Shanghai.
One of the most distinctive things about the system is the "mind the gap" announcement. It's kind of a big pop culture thing.