As Walter's situation grows dire, Sheldon and Brandon join forces in a do-or-die showdown with a supervillain. Hutch runs into trouble during a heist.

The perilous final leg of their journey pushes Sheldon's ragtag team to the brink. Walter reaches out to a questionable source to extract information.

Grace sees first-hand how the Code is affecting the younger superheroes. Tempers flare aboard the ship as Sheldon forges ahead with his expedition.

Sheldon tries to assemble a dream team for his quest into the unknown. An autopsy unearths a puzzling object that connects to Chloe's new acquaintance.