When does Witch Hunter Robin return?

Witch Hunter Robin is a Japanese anime series created by Sunrise and animation director Sh?k? Murase. The series follows a fictional Japanese branch of a secret global organization called "Solomon Toukatsu Nin'idantai" Robin Sena is a "craft user", born in Japan and raised by the Roman Catholic Church in Italy. She is trained to use her craft of fire to hunt down witches. Solomon fights the harmful use of witchcraft using a database of witches.