H.G. and Jane rush to repair the damaged time machine before Dr. John Stevenson - now better known as "The Key Killer" - strikes again. Meanwhile, Vanessa must decide whether or not to confide in Griffin.
Casts:
Freddie Stroma, Joshua Bowman, Génesis Rodríguez, Nicole Ari Parker, Will Chase, Jennifer Ferrin, Michael Benz, Sianad Gregory, Omar Maskati