Fringe : Season 2 : Episode 20 : “Brown Betty”
The much-hyped musical/storytelling episode turns out to be pretty watchable, if a little science-light. Olivia tries to solve the Mystery of the Glass Heart, and (surprise!) finds more than she bargained for.
Walter spells MnSO4 as “manganese sulphate”, ignoring IUPAC guidelines with British flair, but later spells H2SO4 “sulfuric acid”. This inconsistency is probably due to the Brown Betty.