Sgt. Frog

Season 1, Episode 27

Episode Title: Keroro's Father's Coming and Father's Leaving / Keroro: Hot Spring, Go! Go! Go! Sir!

Air Date: 2004-10-02

Overview:

Keroro's father arrives on Pekopon to check on the invasion progress, or lack thereof. / The platoon decides to drill underground, hoping to build a natural hot spring in their secret base.