The Return (1)

Speed Racer Sr. finally returns and reunites with his sons, however X is angry with him. The Mach 6 is stolen by Zile, and the Racer family works together to retrieve it and get Zile arrested. After getting back the Mach 6, Conor discovers a mysterious energy signal coming from the Mach 6, forcing the gang to investigate.

The show’s own verdict is on its page.