S1E67 - The Oubliette, Part One

The Oubliette - a prison so secret only a select few people on the whole planet know about it. And now it appears the knowledge has gotten out, and an evil plot surrounds the place. Join the Infiniteers - and their newly recruited B team - as they race to a remote ocean site to investigate the prison and attempt to put a stop to whatever evil may be heading their way!