Last person to see ill-fated Titan crew alive tapped to direct doc on the submersible's tragic implosion.
beat sheet
Aron Arngrimsson, who sealed the hatch on the Titan before its fateful journey, will helm the yet-to-be-titled documentary.
Director James Cameron has previously criticized Arngrimsson's actions in sealing the hatch, setting up a potentially charged behind-the-scenes dynamic for the doc.