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.
Stars: Freddie Stroma, Josh Bowman, Genesis Rodriguez
Director(s): Steve Shill
Writer(s): Kevin Williamson, Gabrielle G. Stanton, Mary Leah Sutton