Dr. Stevenson escapes authorities via H.G. Well's time machine and heads to modern-day New York City; Wells pursues Stevenson to the future; Wells and Jane continue to search for Stevenson, but their final meeting goes anything but planned.
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.
Dr. John Stevenson has met his match in a stunning - and equally cunning - doctor named Brooke Monroe (series star Jennifer Ferrin), while H.G. and Jane travel back to the 1980s where they make a shocking discovery that could change Vanessa's life.
H.G. and Jane find themselves stranded on the Island of Dr. Monroe. Unaware that they are an instrumental part of the doctor's research, they find themselves fighting for their lives - along with Dr. John Stevenson - but in the end, not everyone gets out alive.
An unwilling participant of Dr. Monroe's experiments, H.G. feels himself changing. Now on a more level playing field and finally able to take on his friend and adversary, John Stevenson, H.G. and Jane race to escape the Island of Dr. Monroe.
Brooke is betrayed by her brother, Griffin, when he joins forces with Vanessa to stop her from furthering their father's research. But just how far is Brooke willing to go when she forms her own unlikely alliance.
Hurt and betrayed, Dr. John Stevenson sets his sights on H.G. and moves forward in a plan for the ultimate revenge by destroying him and those he cares about forever. When H.G. learns of his plan, however, he takes matters into his own hands, finding himself in a place he could never have imagined in his wildest dreams.