V: Season 1

On a day like any other, all of Earth is shocked with the arrival of large alien spacecraft that appear over major cities. The aliens themselves appear benign, offering to exchange their advanced technologies in return for replenishing their supplies. The aliens' spokesperson, Anna, is downright charming eventually focusing on news reporter Chad Decker as a means of seducing Earth's population. Earthlings are soon divided into two camps: those who welcome the Visitors with open arms and those, like Father Jack Landry, who see them as a threat. For FBI Agent Erica Evans, it's work as usual but as a single parent, she is concerned with her son Tyler's apparent obsession with the new arrivals. She also learns that the terrorist cell she has been investigating may have been made up of Visitors.

As the Visitors continue negotiations with the United States and other countries to establish diplomatic relations, opponents begin to slowly piece together the extent to which they have already infiltrated human society. FBI Agent Erica Evans is still reeling over the realization that her FBI partner of seven years was actually an alien. Her cover story for the warehouse shooting soon falls apart but she and her boss soon discover clues into the web of deceit that exists. They also realize that virtually anyone could be one of them. Erica is also worried about her son Tyler who is enamored with the Visitors and the pretty Lisa in particular. His response to a group of hecklers damages his chances of remaining in the aliens good books. Finally, TV journalist Chad Decker decides to get back at Anna and the Visitors by hosting an honest discussion on the pros and cons of opening diplomatic relations with them.

With the signing of a treaty and the opening of diplomatic relations, the Visitors are formally granted entry to the United States. Anna sees a potential problem as the leader of the anti-Visitors movement, whose husband was killed the day they arrived, seems to be getting a lot of public sympathy and support. Anna sets out to win her over. Erica and Father Jack Landry try to identify who might have been involved in the warehouse killings but unbeknown to her, her FBI partner Dale survived and is being treated aboard the mother ship. When threats of assassination are made against the Visitors, Erica finds herself being assigned to protect them. It also becomes apparent that the Visitors are manipulating virtually everyone around them. Erica's son Tyler invites Lisa home but his Mom shows up at an inopportune moment. The Visitor fifth columnists begin to organize.

The Visitors continue to try and win favor with the population, this time by announcing that they will share their medical knowledge. Not only are they sharing advanced medical scanning techniques but they announce they will make available to all a new supercharged vitamin treatment. Erica, Jack and fifth columnist Ryan Nichols learn that they are in fact putting a drug in regular flu shots. Meanwhile, Anna agrees with Lisa that Erica's son Tyler is exactly the person they want for their future plans. Anna also learns that Dale, Erica's one-time FBI partner, was killed aboard the ship and takes steps to identify the fifth columnist who may be responsible. Ryan's wife Valerie has some important news for him.

Having successfully torched the warehouse containing the the Visitor's supply of R6, the Visitor security officer has already attacked Father Jack and is now after Erica. She also decides to try and recruit Kyle Hobbes, a soldier of fortune and weapons expert, who has is wanted by the FBI, to train them into a fighting force. Ryan is concerned about Valerie's pregnancy, particularly since Visitors and Humans were supposedly unable to procreate. Valerie is worried about the pregnancy and wants to see a doctor right away. Erica is worried about Tyler who is spending a night aboard the Visitors' spaceship. He is still enamored with them - and Lisa in particular - but it is clear that Anna is looking for something specific in his memories that will bind Tyler to them. Anna is also worried that Chad hasn't taken up their offer of treating his aneurysm and sets the wheels in motion to get him on their side. Anna also decides that they need soldiers immediately and since the Visitors' army won't arrive for some time, she decides to make one.

Anna believes she has found a way to identify fifth columnists: they are acquiring human emotions and can be screened for them. They start by checking everyone on board the mother ship. The Visitors announce that humans will be allowed to live aboard one of their 29 ships. Kyle Hobbes convinces Erica, Ryan and the others that they have to let Anna know they're there and that they are a threat. Ryan is increasingly concerned about Valerie's pregnancy which is advancing at a rapid pace. He has to decide whether to tell her what is going on but in the short term has to go on board the mother ship to get medicine or Valerie will not survive the pregnancy.

Erica, Ryan and Jack go on a harrowing mission to find the legendary John May in order to rescue Georgie, Anna brings Chad aboard the Mothership for a story on her Live Aboard Program, and Tyler confronts his mom about his mysterious past.

Chad and Anna are in Geneva, Switzerland for the U.N. Energy Summit, where Anna is going to present a gift of technology to the world. Meanwhile, Erica learns that the V Task Force is investigating The Fifth Column, and Valerie goes on the run, knowing something is different about her baby and not sure she can trust Ryan.

With the sniper under their control, Erica wants him to reveal the location of the hard drive with the names of the fifth columnists. Kyle is prepared to do whatever is necessary to get the information but Father Jack is somewhat reticent. Ryan tells Valerie the truth about himself. She is disbelieving and finds it incredible he has kept this from her all of this time. Tyler is told he's qualified for the live aboard program but is worried about his mom's reaction. Lisa drops in for a visit but has surprising advice for him when she sees Erica's reaction. Anna learns of Valerie's pregnancy and instructs their top doctors to find out how it happened. She also dispatches a V soldier, the first of its kind to set foot on Earth, to locate her. Chad undergoes his surgery but later approaches Father Jack for information about the fifth column.

Joshua informs Ryan that Anna will be dispatching a shuttle full of trackers to locate and eliminate fifth columnists. He, Father Jack and Kyle decide to shoot it down before it lands. Not all is as it seems however and it's all part of Anna's plan to discredit the fifth column. There's more to the live aboard program that meets the eye. Chad is still carrying on his facade of concern about the Vs and sympathy for the fifth columnists. Father Jack lets something slip but he has a crisis of faith when he thinks they have taken innocent lives. Erica discovers something interesting about the remains in the wreckage. Anna make a dramatic - and manipulative - announcement.

In the aftermath of the downed shuttle, Anna continues to manipulate human emotions and arranges for one of the Vs to be badly beaten and then left in alley. She announces that they no longer feel safe on Earth and will therefore leave leading to an outcry and world-wide support for them to stay. As part of her plan, Anna ensures that the attackers are identified, once again framing Kyle Hobbes for the attack. The second attacker is identified as Paul Kendrick, a government scientist who mysteriously disappeared from his job several weeks before. He had been working with others on a project and may have inadvertently developed a weapon against the Vs. Kyle meanwhile seems to be playing both sides of the fence and makes an offer to the Visitors.

Erica decides they need to make a statement about their opposition to the Vs. They decide to go aboard the mother ship and destroy Anna's eggs which are about to hatch and produce her army of warriors. She has an opportunity to get aboard the spacecraft when Tyler once again raises the issue of joining the live aboard program and Anna and Lisa invite them for dinner. Father Jack makes his opposition to the Vs known, much to Father Travis' dismay. Chad Decker once again plays a part in exposing a fifth columnist but comes to the realization that Anna has been using him. Kyle learns why the Vs have framed him. After the attack, Anna has a surprising reaction and takes swift action.

A recap of the first four episodes summarizes what has happened since the Vs arrived.