Ep 18 – “As if to Fly: Stop the Launch of the Battleship Purgatory!” / “Tobu ga Gotoku! Senkan Rengoku Shukkō o Soshi Seyo” (翔ぶが如く! 戦艦煉獄 出航を阻止せよ)
Kenshin, Sanosuke, and Saito go to Osaka to find Shishio and his men on board a ship. They find Shishio, and Shishio launches the Purgatory, a steel-plated battleship he paid a fortune to get. Shishio plans to use the Purgatory to launch an assault on Tokyo.