Fringe

Medford, Mass.  Shipments out of Elias Cryonics - Research and Storage must routinely happen in the dead of night, as no one seems to be overly concerned about the truck at the loading docks.  A car pulls around and some guy (let's call him Curtis) says he's lost.  He's not.  Curtis and his accomplice, who seems to work for the company, shoot the security guards who are supervising the loading of a bunch of cryogenically frozen heads.  However, one of the guards shoots back and finally kills the accomplice with a head shot.  The dead accomplice bleeds quicksilver.

Harvard, Mass.  At first I thought Walter was cooking again and that Astrid was chopping up chives.  Nope, they are tapeworms.  He is trying to make a concoction that will help Olivia recover her memories of her trip to the other side.  Peter thinks the idea is insane but Olive downs the flatworm cocktail before anyone realizes what she is doing.

Medford, Mass.  Peter, Olivia and Broyles meet up at Elias.  This is the third cryo-lab to be robbed in recent weeks.  Walter is eager to see the body that is bleeding silver.  As he examines the corpse, Not-Charlie comes over.  He looks like he's coming off a three-day bender.   Walter finds an insta-disguise device in the corpse's pocket.  He hands the device over to Peter.

Not-Charlie meets up with Curtis, who tells his partner that his current form is killing him. Unfortunately, Not-Charlie can't switch bodies because his device is broken and he doesn't have permission to return to the other side.  As they talk, Curtis cracks open the cryo-containers and examines the head.  He doesn't find what he is looking for and tosses the head into a ravine, where it joins the others.  They make plans to rob a fourth lab in North Carolina.  Curtis and Not-Charlie think that Bell might have told Olivia where to find whatever they are looking for (which is probably a specific head.)

Broyles wants Olivia to have a protective detail; obviously whatever happened to her is not over.  She declines.  Meanwhile, Peter declines to hand the working device over - he wants his friend to have a look at it first.

Back at the lab, Walter's examination is progressing.  The body is not human.  It is the mercury that allows the body to maintain its shape.  He suddenly gets a "oh, I just realized something and it's not good" look and tells Astrid to call Olivia immediately.