Photo: Apple TV+ Spoilers follow for “ Sweet Vitrol ,” the eighth episode of season two of Severance , which premiered on Apple TV+ on March 7. The biggest reveal of “Sweet Vitriol,” a rare Harmony Cobel–centered Severance episode, may not be that she invented the severance procedure or that Lumon stole credit for her work. It may be more of a surprise that Patricia Arquette’s character has … a friend? The hour follows the former manager of the severed floor to her snowy, desolate childhood