FBI agent Olivia Dunham (Anna Torv) and the Fringe Team started off investigating a dark, international conspiracy that featured an enormously powerful technology corporation, a long-running dispute over secret paranormal research, and an honest-to-goodness mad scientist, Dr. Walter Bishop (John Noble). As they dug deeper, Bishop's craziest ideas turned out be true, revealing that the plot stretched all the way into a parallel universe. The resolution of that plot has long-lasting impact on all of the characters. Also along for the ride is Dr. Bishop's son, Peter (Joshua Jackson), who's equal parts genius and rogue and has some major secrets of his own.