Five friends attempt to flee when a mysterious alien ship arrives in the skies over their home city. However, it soon becomes clear that they may hold the key to stopping an invasion.
After being punished for retreat from combat, Ranger David Martel is given command of the Liandra, a haunted 20-year old Minbari fighting ship. He's escorting ambassadors to a secret archaeological site, the oldest city on record and a clue to a dangerous ancient race.
16-year-old Cassie Sullivan tries to survive in a world devastated by the waves of an alien invasion that has already decimated the population and knocked mankind back to the Stone Age.
A parasitic alien soul is injected into the body of Melanie Stryder. Instead of carrying out her race's mission of taking over the Earth, "Wanda" (as she comes to be called) forms a bond with her host and sets out to aid other free humans.
A teenage fugitive with an incredible secret races to stay one step ahead of the mysterious forces seeking destroy him. With three dead and one on the run, the race to find the elusive Number Four begins. Outwardly normal teen John Smith never gets too comfortable in the same identity, and along with his guardian, Henri, he is constantly moving from town to town. With each passing day, John gains a stronger grasp on his extraordinary new powers, and his bond to the beings that share his fantastic fate grows stronger.