Watched one episode. I think episode 4.

Fairly strong doc show about the Aum Shinrikyo sarin gas attack on the Tokyo subway in 1995. The end draws parallels between the Twin Towers in NY and the religious-based cults that think that killing innocents isn’t wrong if done for religious reasons. Points out that remaining members of Aum (under a new name) live together and still believe that the leader what right in his thinking but they were not ready to understand or execute his demands. Stupid. If you want to read more I would recommend “Underground: The Tokyo Gas Attack and the Japanese Psyche” by Haruki Murakami.