A couple struggle to thwart the plans of mind-controlling aliens in the 1960s, while evading a covert government agency, Majestic-12, attempting to keep the threat of an invasion from the American public.
In the series' final episode, Loengard (Eric Close) volunteers to be a guinea pig for Hive abduction in an effort to save his son. Juliet: Jeri Lynn Ryan. Albano: Conor O'Farrell. Bach: J.T. Walsh. Kim: Megan Ward. Steele: Tim Kelleher. Timothy Leary: Don Most.
A young Colin Powell (Wolfgang Bodison) leads John and Juliet (Jeri Lynn Ryan) on a dangerous mission to a Hive-controlled Russian communications station. Bach: J.T. Walsh. Carl Sagan: Joseph Urla. Albano: Conor O'Farrell. Halligan: Charley Lang.
The race to retrieve a stolen segment of the Roswell UFO film that proves the existence of the Hive leads John and Juliet (Jeri Lynn Ryan) to a showdown with Sayers and the Hive that causes the power outage of 1965. Bach: J.T. Walsh. Sayers: Megan Ward. John: Eric Close.
Loengard (Eric Close) is pushed to his limits while continuing his search for Sayers, who has fallen under Hive control and been given a terrifying choice: join the Hive or lose her baby. Bach: J.T. Walsh. Juliet: Jeri Lynn Ryan. Steele: Tim Kelleher. Albano: Conor O'Farrell.
Kim (Megan Ward) is abducted by the Hive as her pregnancy nears its term, and the captured Gray provides the only clues to her disappearance. Meanwhile, John (Eric Close) and Juliet (Jeri Lynn Ryan) must search for her in the rioting Watts section of L.A. Bach: J.T. Walsh.
John (Eric Close) rejoins Majestic with a plan to lure an alien craft to the ground and Kim (Megan Ward) discovers she has a psychic connection with a wounded Gray. Meanwhile, Juliet (Jeri Lynn Ryan) races to stop Hivers from abducting a little girl. Bach: J.T. Walsh. Albano: Conor O'Farrell.
Loengard (Eric Close) is forced on a deadly mission with Bach (J.T. Walsh) to war-torn Vietnam to erase all signs of a crashed saucer and its crew. Captured by the VC, the two find a newfound respect for each other. Sayers: Megan Ward. Albano: Conor O'Farrell.
Loengard has a strained reunion with his family while Bach and Majestic-12 are with a Hiver who may be connected to the murder of Lee Harvey Oswald. Albano: Conor O'Farrell. Sayers: Megan Ward. Bach: J.T. Walsh. Steele: Jim Kelleher.
The death of one of Loengard's college chums opens the door on a Hive plot to pollute the food chain. Morrison: Brent David Fraser. Heller: Christopher Wiehl. Abbott: Brittney Powell. Dewey: Daniel Markel. Supervisor: Carl Ciarfalio. Whitman: Mark Bramhall.
A message from John's old boss leads him and Sayers to Mississippi, where they find evidence of Hive involvement in the disappearance of three civil-rights workers. Clayton: Dean Norris. Etta Mae: Lorraine Toussaint. Arthur: Kim Robillard.
Kim and John separate when she goes home for the wedding of her sister, whose betrothed (Jamie Denton) might be too good to be true; John investigates an unusual UFO sighting. Andrea: Lisa Waltz. Jack Ruby: Jack Lindine. Marcel: Richard Gilliland.
A centuries-old UFO crash site attracts Loengard and Sayers, Bach and the Hive. But a prophecy foretells danger if the area is disturbed. Tug: Sam Vlahos. Barrow: Eric Steinberg. Phillips: Steven Ford. Gen. Thompson: Joseph Whipp. Mittermeyer: Dana Gladstone.
Sayers and Loengard must move fast to avoid Bach, who's seeking the same information about troubling events on a Wisconsin farm. Kester: John Dennis Johnston. Waring: Maury Sterling. Daughter: Lauren Zabel. Youngest Son: Seth Mumy.
Sayers and Loengard head to Las Vegas, where they learn that Howard Hughes (Madison Mason) has mistaken the Hive conspiracy for a Communist plot. Susan: Tyler Layton. Cochran: Scott Jaeck. Gettings: Joey Aresco. Dover: Andrew Hawkes.
Loengard and Sayers discover a Hive plot to interfere with the Beatles' appearance on "The Ed Sullivan Show" and send a subliminal message to millions of people. John Lennon: Joe Stefanelli. Ed Sullivan: Jerome Patrick Hoban. Brian Epstein: Carey Eidel.
Sayers' mysterious visions lead her and Loengard (Eric Close) to Florida, where they discover a Hive operation that threatens the U.S. space program. Yount: John Mese. Augatreux: Todd Jeffries. Dr. Gould: Natalija Nogulich. Kissinger: Peter Van Norden.
In the aftermath of the Kennedy assassination, Sayers and Loengard go to Texas to retrieve the alien artifact and discover a Hive connection to Lee Harvey Oswald. Bobby Kennedy: James F. Kelly. Jacqueline Kennedy: Locky Lambert. Truman: Hansford Rowe.
In 1961, a Congressional aide (Eric Close) and his girlfriend (Megan Ward) discover a Government cover-up involving alien invaders and a covert agency aimed at finding them. Bach: J.T. Walsh. Steele: Tim Kelleher. Albano: Conor O'Farrell. Pratt: John M. Jackson.