What is canada vs the world episode 4?

As an AI language model, I don't have access to real-time information or specific details of TV shows. However, as per my initial search, "Canada vs. the World" is a sports-oriented TV show where Canadian athletes compete against athletes from around the world in several disciplines. Episode 4 might feature a different competitive event or showcase a specific Canadian athlete's achievement and challenges against their international counterpart. If you provide more specific details, I can try to generate a better answer for you.