The Underworld series is a series of Romeo & Juliet-like vampire/werewolf films directed by Len Wiseman and Patrick Tatopoulos. The first film, Underworld, was released in 2003, and the second film, Underworld: Evolution, was released in 2006. A prequel, Underworld: Rise of the Lycans, was released on January 23rd, 2009. A fourth film is currently in development.
Vampires vs. Lycans
Since that time, a war has broken out. The Lycans were enslaved by the Vampires, used as slaves to be the guardians of their lairs during the daylight hours, but they revolted during the Middle Ages. Both sides have their own lair and chain of command. Vampires have Death Dealers, vampire warriors charged to fight and kill the Lycan enemy. There are three Vampire elders. Rules and tradition demand that two be at rest while one is awake; this arrangement calls for each elder to rule for one century followed by two centuries of sleep.
Films
Underworld (2003)
Underworld tells the story of Selene, a Death Dealer bent on destroying Lycans as an act of revenge against the Lycans that allegedly killed her family. She discovers that the Lycans are pursuing a human, Michael Corvin, for experimentation; Selene captures Michael herself to find out what the Lycans are up to. Along the way, Selene not only discovers a mutinous plot to destroy the Vampire Elders, but also a shocking revelation about her father-like Elder, Viktor.
Underworld: Evolution (2006)
After killing Viktor, Selene takes Michael to a Vampire safehouse and plans to return to Viktor's estate to awaken Markus, the last Vampire Elder. Before she can return, Markus confronts her, having been awakened by Viktor's traitorous second-in-command, Kraven. Markus doesn't seem keen to help Selene and wishes to steal her memories for information. While on the run from Markus, Selene and Michael discover that Markus is the first Vampire, and that he plans to free his imprisoned brother, William, the first and most savage Lycan.
Underworld: Rise of the Lycans (2009)
A prequel to the original film, Underworld: Rise of the Lycans tells the origins of Lucian and Sonja, a Lycan and Vampire that must keep their love life a secret due to their races. After Sonja's father, Viktor, hears of her pregnancy by Lucian, he orders her immediate execution to prevent a combination of the two races. This devastating event causes Lucian to lead a Lycan uprising against Viktor, thus bringing the start of a war that will last for centuries to come.
Future
A fourth film is in development, it will be shot in 3-D and sources state that Beckinsale will reprise her role as Selene. There's a possibility of a fifth and sixth movie. The fourth movie is currently aiming for a release date of January 21st, 2011.