You will Watch Fantastic Four: Worlds Greatest Heroes Episode 4 online for free episodes with HQ / high quality. Stream cartoons Fantastic Four: Worlds Greatest Heroes Episode 4 Hard Knocks Bruce Banner visits Reed at the Baxter Building. Banner changes into the Hulk and now the FF must stop his rampage in NYC and keep him from being captured by Agent Pratt who wants to use the Hulk for his own agenda. In the end, Pratt fails to stop Hulk and the Hulk is loose in the badlands. Otherwise, the Fantastic Four have saved the day again.