"Metamorphosis" (2019) is the seventh episode of Van Helsing Season 4, introducing Dracula as the primary antagonist and reuniting three generations of the Van Helsing lineage. The episode focuses on the "metamorphosis" of Elder Sam to serve the Dark One, a pivotal shift in the show’s lore. For a detailed breakdown of the episode and character arcs, visit Den of Geek . "Van Helsing" Metamorphosis (TV Episode 2019) - IMDb