V

In the highly anticipated and compelling series premiere, the Visitors (V's) are initially viewed with fear, but quickly become a fascination. Elizabeth Mitchell stars.

Erica and Father Jack find themselves being tracked by a "Seeker" from the V's. Chad, who is not happy with his first interview with Anna, determines to become more investigative.

Chad reports from the Peace Ambassador Center as 100 diplomatic visas are being issued to the first wave of Visitors in the U.S. Anna will get the first, but not everyone agrees with the decision. Meanwhile, Erica, who is paired with a V officer, has started tracking a death threat, and Ryan begins reaching out to his old friends to build up opposition forces to help fight off the V's.

Erica works with newly formed allies to uncover a biological threat they suspect the Visitors have been plotting. Plus, Anna befriends a special guest inside the mothership.

Erica finds her life in danger when she's attacked at home, and the Visitors build up their defenses. Anna is upset with Chad and Ryan is concerned about Val's pregnancy.

Anna introduces her pilot program to invite select groups of humans to stay on each of the 29 spaceships, and Ryan must deal with the fact that Valerie's pregnancy is wildly accelerated. Plus, Tyler learns a secret about his mom, Erica, and someone makes a sacrifice to save Ryan. Recurring guest star DAVID RICHMOND-PECK appears as Georgie.

Erica, Ryan and Jack go on a harrowing mission to find the legendary John May (guest star MICHAEL TRUCCO -- Battlestar Galactica) in order to rescue Georgie (recurring guest star David Richmond-Peck). Plus, Anna brings Chad aboard the Mothership to do a story on her Live Aboard Program, and Tyler confronts Erica about his mysterious past. And what of Ryan's past?

Chad and Anna go to Switzerland for the UN Energy Summit. Meanwhile, Erica learns that the Fifth Column is being investigated, and Valerie goes on the run, unable to trust Ryan.

Erica, Jack and Hobbes (CHARLES MESURE) take measures to protect the Fifth Column members. Ryan reveals to Val that he is a V. Chad boards the Mothership to heal his aneurysm.

Erica, Ryan, Father Jack and Hobbes (recurring guest star CHARLES MESURE) learn Anna sent a shuttle filled with a deadly V tracker team to find them, and must figure out how to stop the shuttle from landing. Meanwhile, Anna gives Tyler his invitation to the Live Aboard Program, and Chad confronts Father Jack on what he knows about the Fifth Column.

After a violent attack on someone very close to Anna, she delivers a message that the V's don't feel safe and will be leaving. Anna also gives a list of possible Fifth Column members to Chad, hoping he'll investigate and help in finding them. Meanwhile, Erica and the team try to track down a scientist who may have created a weapon that the Visitors are afraid of.

In the season finale, Val's water breaks -- her baby with Ryan will be born. Erica goes on the offensive aboard the Mothership. Chad finds out Anna has been using him.