Darby Lynn Totten

The team investigates when a Massive Dynamic employee (Ptolemy Slocum) is so certain he is being attacked by butterflies that he leaps from a window to escape them.

Olivia, Walter and Peter find a robbery suspect trapped inside a vault as if the wall had solidified around him.

With the mastermind behind Kate’s death uncovered, Peter and Neal explore their pasts to gain answers. Neal explains the first time he met Kate (guest star Alexandra Daddario) and Mozzie, and Peter details the circumstances behind Neal's first arrest.

The team finds freakish remains at the crash site of an international jumbo jet; with answers just out of reach, Olivia and Peter decide to go under cover.