Fringe : Season 3 : Episode 10 : “The Firefly”
Fringe restarts strong after a long break, with Walter and the Observers taking centre stage in a slowly-unravelling story featuring the butterfly effect. Also: time travel, Christopher Lloyd and lots of foreshadowing.
In the opening scene, Walter appears to be listening to a copy of Mahna Mahna and using Vee Gee glassware. As usual, the scientific equipment is set up in a hugely complex fashion with no regard for open flames or fume cupboards.
In lab chemistry, anhydrous magnesium sulfate (MgSO4) is typically used as a dessicant to remove water from a solution before filtration.