Joe Locke's Teen isn't the only character shrouded in mystery in new Marvel series Agatha All Along. There's Aubrey Plaza's Rio Vidal, too, who may or may not be a gender-swapped version of Mephisto's son Blackheart.

Agatha All Along will introduce Nicholas Scratch as Agatha's son. The name Nicholas Scratch comes into prominence for us through the airing of the first two episodes of Agatha All Along, recently made available for viewers on Disney Plus,