Sorry. All you need to do is google BBC2 live and choose a stream that works. They don't have Top Gear specifically, it's that they steam it what I believe is 24/7 (or useful programming).
Episode review. Pretty good, the fact that there wasn't any episodes since last year made this episode better but it wasn't spectacular. I let you watch it to see content but this episode it's the pagani, Bentley GT (off road) and Jeremy's scooter thing.