Episode Title:
Mach 5 vs. Mach 5: Part 2.
Episode Description:
Speed chases Cumulus to his undersea base where he learns that Cumulus plans to destroy all the military bases in the world. Dr. Nightcall's daughter is killed trying to stop Cumulus. Cumulus himself is killed when Speed throws him from the duplicate Mach 5. Dr. Nightcall promises to devote his life and the base to undersea research in memory of his daughter.
