Fringe

Olivia awakens because Peter has jammed a hypodermic needle into her heart.  Olivia is desperate to get to Nina Sharp.

Peter and Walter say goodbye to Rebecca. She stares at Peter in the strangest way.  When he questions her about it, she says it must be the drugs.   Walter tells Peter that he wants to see Rebecca home.  Peter lets him go.

Nina recognizes the phrase "a storm is coming."  So do Supernatural fans, and while it's a different storm, the end of the world is still night.  Anyway, Bell used it when he was telling Nina about the Pauli exclusion principle.  The two universes cannot occupy the same space.  One must be destroyed and he's afraid it will be our world.  While talking to Nina, Olivia remembers something else from her conversation with Bell - Laston-Hennings Cryogenic.  That is where the much-desired head is located.  Before she can impart this knowledge to Ms. Sharp, she receives a text from Not-Charlie warning her that Nina is a shapeshifter.

She meets Not-Charlie outside of Massive Dynamic and tells him she almost spilled the beans about the head being at the North Carolina facility.  Charlie calls someone - I assume Curtis - to give him the news.  While he's on the phone, Olivia receives a picture of the rendering: Charlie.   He knows that she knows so he tries to kill her.  He succeeds in beating the hell out of her until they are distracted by a passerby.  Olivia shoots Not-Charlie in the head and it is little comfort that he bleeds silver.

Walter takes Rebecca home.  She invites him in but he declines, adding it was wrong for him to have taken advantage when she was younger.  He leaves her on the doorstep. 

Broyles tries to comfort Olivia after she killed her not-partner.  He has more bad news as well.  Someone hit the facility about 15 minutes before the FBI got there.  They can assume the head was stolen.

It was.  Curtis has it.  The symbol is a scar under the head's hair.  Curtis places the head on an autopsy table a couple inches above the neck of a headless corpse.  A pool of mercury under the head begins to react, forming a neck between the body and head.  When the process is complete, the once-frozen head opens its eyes.