TV anime Chaos;Child（カオスチャイルド）has just announced an unaired episode Chaos;Child Silent Sky. The episode is still in production and the release date is yet to be confirmed.
AT-X、TOKYO MX、サンテレビにて最終回ご視聴いただきました皆様、誠にありがとうございました！そして、「カオスチャイルド SILENT SKY」制作決定です！ご期待ください。https://t.co/99mvIkU2gB #カオチャアニメ pic.twitter.com/OYKUDrvHIb
— TVアニメ「カオスチャイルド」公式 (@chaoch_anime) March 29, 2017
Chaos;Child is originally a visual novel developed by 5pb. The story follows a series of mysterious murder cases called NewGene. The last episode of the TV anime spin off aired yesterday (29th March).