With an old foe of Helen's in need of lifesaving treatment, Will learns more about the Five than he ever imagined could be true.
Did You Know?
During the flashback at the beginning of the episode, you can see some basic algebra formulas on the board, such as (x+y)^2=x^2+2xy+y^2. I'd assume any math-based elements involved in such an experiment should be far more sophisticated than that. See more
[Looking at Adam's face
Son of a bitch!
Who we got?
Well, I guess cockroaches can come back from the dead.
Who the hell is this guy?
Not one person, but two. Prepare to meet Jekyll... And Hyde.