Future Boy Conan (1978)

Season 1: Episode 18

Conan saves Lana from Industria's soldiers but gets knocked out; Lana manages to hide him before she gets captured and taken aboard the gunboat. Industria occupies High Harbor, and Orlo is installed as a puppet governor. To deprive them of their only means of support, Conan and Gil, the only villager to escape, prepare to sink the gunboat with explosives. But after planting the charge, Conan learns that Lana is aboard and boards the vessel to retrieve her, but ends up captured. After tricking the crew into taking him out of his cell, the charge detonates, sinking the ship and allowing Conan to rescue Lana from her cell.