As people struggle to come to terms with the new environment in Edo, Hijikata and Okita get some rather unexpected visitors.
Do you know why humans have 
survived for five billion years
هل تعلمون لماذا نجا البشر لخمسة مليارات سنة
¿Saben cómo ha conseguido 
sobrevivir la humanidad en la Tierra
Sabem como o ser humano sobrevive no ambiente
 da Terra, que muda há 5 bilhões de anos?