Japanese Spiderman - Season 1 Episode 16 Clever Dog, Run Back to Dad!
Overview: The Iron Cross Army devises a plan to poison the city's water system by destroying the dam. Spiderman stumbles on the plan when a boy and his dog are attacked by the Iron Cross Army while hiking in the woods. Now with the help of the boy and his dog, Spiderman must defeat the army and their monster before the city is poisoned.