Guest Stars: Lucinda Jenney as Nadine Walden | Jack Moore (1) as Soldier #1 | Ward Wright as Sergeant | Michael Buster as Ensign | Steven Anderson (1) as Doctor | George Sullivan as NSA Superior | Mowava Pryor as NSA Agent | David Kirk Chambers (2) as NSA Officer | Richard Hamilton (1) as Captain | J. Scott Bronson as Captain Marshall | Frank Gerrish as Sheriff | Diana Bellamy as Mother | Brian Vaughan (1) as Tyler Walden

Writer: Dean Devlin, Roland Emmerich

Guest Stars: Rob Elk as Father | Matthew Bartilson as Glenn | Chad Cox as Clerk | Nichole Pelerine as Sarah | Chris Ufland as Soldier | Sandra Thigpen as Security Guard | Harry Shearer as Louis Faraday | Greg Callahan as General Montgraft | Brian Vaughan (1) as Tyler Walden | Richard Riehle as Principal Shinagel | Lucinda Jenney as Nadine Walden | Richard Cox (1) as Asst. Director Grushaw

Writer: Dean Devlin, John Masius

Guest Stars: Charles Chun as SatCom Officer | Sam Anderson as Unknown | Matt Clark as Monroe | Tammy Lauren as Charlotte MacArthur | Lola Glaudini as Young Constance MacArthur

Guest Stars: Eric Don as Jason | Judy Kain as Nurse | Jill Remez as Dr. Patricia Ryan | Michael O'Hagan (1) as Dr. Howard Stein | Gregg Almquist as Congressman Hamilton | Cynthia Mace as Congresswoman Wagstaff | Peter Carlin (1) as Spencer Davis | Sam Gifaldi as Stephen Burton | Wendy Gazelle as Ruth Burton | Robert Knepper as Alex Burton

Guest Stars: Stephen Berra as Danny | Greg Callahan as General Montgraft | Larissa Laskin as Katherine | Tony Amendola as Thomas | Vanessa Zima as Melissa | Jessica Tuck as Lawson

Writer: Valerie Mayhew, Vivian Mayhew

Guest Stars: Thomas Jacob Newton as Young Ben Jordan | Madison Miller as Young Elaine Barker | Teddy Lane, Jr. as Cop | Granville Ames as Sergeant Roberts | David Drew Gallagher (1) as Agent McNally | Rosie Malek-Yonan as Maria | Peter Carlin (1) as Spenser Davis | Turhan Bey as Unknown | Christine Healy (2) as Elaine Barker | Nicolas Surovy as Ben Proctor

Guest Stars: Marte Boyle Slout as Mother | Granville Ames as Sergeant Roberts | John Kassir as Unknown | Courtney Peldon as Donna | Michael Bacall as Carlo | Charles Hallahan as Unknown | Adam Baldwin as Michael O'Ryan

Guest Stars: Granville Ames as Sergeant Roberts | Greg Callahan as General Montgraft | Barbara Bain as Elder Constance MacArthur | Tammy Lauren as Charlotte MacArthur | Jan Hoag as Unknown | Adam Baldwin as Michael O'Ryan | Lola Glaudini as Young Constance MacArthur | Bill Morey as Henry Milton

Writer: Valerie Mayhew, Vivian Mayhew

Guest Stars: David Sawyer (1) as Guard | Burke Roberts as Tony | Steve Monroe (1) as Steven | Adam Biesk as David O'Ryan | Travis Wester as Young Vise | Bruce French as Father Traylor | Greg Callahan as General Montgraft | Dennis Burkley as Louie | Michael Harney as Warden Burk | Adam Baldwin as Michael O'Ryan | Richard Cox (1) as Asst. Director Grushaw

Guest Stars: Conrad Bachmann as Male Shadow | Wendy Worthington as Female Shadow | Glenn Taranto as FBI Agent | Rob Aigner as Technician | Laurie Lathem as Sally Wickan | Amy Parish as Betty York | David Drew Gallagher (1) as Agent McNally | Granville Ames as Sergeant Roberts | Richard Cox (1) as Asst. Director Grushaw | Adam Baldwin as Michael O'Ryan | John Carroll Lynch (1) as Joe York | Shaun Toub as Unknown | Greg Callahan as General Montgraf

Writer: Todd A. Kessler (1), Edward Gold

Guest Stars: Rachel Winfree as Nurse | Michael Haywood Norris as Sheriff Parks | Alonzo Bodden as Lieutenant Warren Reed | Mary Carver as Winifred Quick | Lori Heuring as Laura Scott | Efrem Zimbalist, Jr. as Wayland Scott | Jack Rader as Randall Craig | Eve Brenner as Hospital Administrator | Fred Pinkard as Beauregard Wilde

Guest Stars: Anne D. Shedd as Nurse | Peter Hendrixson as Haz-Mat Member | Don Brunner as Security Guard | Pip Newson as NSA Technician | Fred Saldone as Cop | Dominic Oliver as Benny | Sue Goodman as Neighbor | Dianne Turley Travis as Dr. Pauline Greenfield | Michael Bryan French as Dr. Raymond Pascal | Walter Olkewicz as Ozzie Faulkner | Mary Mara as Magnolia Hill

Writer: Ayn Marie Carrillo, Samuel W. Gailey

Guest Stars: Marte Boyle Slout as Mother | Amy Parish as Betty York | Darwyn Carson as E.R. Nurse | Paul Raci as Dark Grey Suit | Alonzo Bodden as Lieutenant Warren Reed | Brooks Almy as Shiela Logan | Rosemary Murphy as Unknown | Ellen Bry as E.R. Doctor | Adam Biesk as David O'Ryan | Richard Cox (1) as Asst. Director Grushaw | John Carroll Lynch (1) as Joe York | Richard Hoyt Miller as Man One

Writer: Jean Gennis, Phyllis Murphy