• Special Guest Stars: Roy Scheider (Captain Nathan Bridger), Michael York (President Alexander Bourne)
• Co-Starring: Michael Costello (Secretary General McGath), Andrew Stahl (General Armand Stassi)
• Featuring: Damon Jones (Lieutenent Marrs), Paul Kiernan (Shepps), Phillip Martinez (Janitor), Karen Fraction (Dr. Perry), Kristy K. Eisenberg (Catherine)
• Written By: Clifton Campbell
• Directed By: Anson Williams

• Special Guest Star: John D'Aquino (Ben Krieg)
• Guest Starring: Tim DeKay (Lawrence Deon)
• Co-Starring: Ralph Wilcox (Mason Freeman), Michael Costello (Secretary General McGath), Lou Bedford (Johnson)
• Featuring: Vivienne Sendaydiego (Booth), Monique Mannen (Hostess), Jennifer Langdon (Waitress), Donna Preudhomme (Young Woman), Wolfgang Zechmayer (Refugee)
• Written By: Patrick Hasburgh
• Directed By: Jesús Treviño

• Special Guest Star: Patricia Charbonneau (Elaine Morse)
• Guest Starring: Holly Gagnier (Rachel)
• Co-Starring: Michael Costello (Secretary General McGath), Brett Rice (Dustin Thaw)
• Featuring: Timothy Bass (Cash), John Maynard (Hauler Captain), Elizabeth Rothan (Dispatch), Avis-Maire Barnes (Female Hauler), Saadia Persad (Hostess), Jim Coleman (Tech)
• Written By: Lee Goldberg & William Rabkin
• Directed By: Oscar L. Costo

• Guest Starring: Tim DeKay (Lawrence Deon), Cameron Thor (Dumont)
• Co-Starring: Ralph Wilcox (Mason Freeman), Michael Costello (Secretary General McGath)
• Featuring: Leroy Mitchell, Jr. (Barkeeper), Bob Hite (Martin Majors), Kristian Truelsen (Technician), George Colangelo (Passenger), Sheri Cook (Young Girl)
• Written By: Javier Grillo-Marxuach
• Directed By: Bruce Seth Green

• Guest Starring: Wanda De Jesús (Commander Pamela Loper)
• Special Guest Star: Bernie Casey (Admiral Vanalden)
• Co-Starring: Michael Costello (Secretary General McGath), Andrew Stahl (General Armand Stassi), James Crittenden (Commander Daltrey)
• Featuring: Leesa Halstead (Mara), Gary Bristow (Lieutenent Abrams), Peter Paul Del Leo (Soldier / Guard)
• Written By: Lee Goldberg & William Rabkin
• Directed By: Anson Williams

• Special Guest Star: Michael York (President Alexander Bourne)
• Guest Starring: Trevor St. John (), Michael Costello (Secretary General McGath)
• Co-Starring: Andrew Stahl (General Armand Stassi), Karen Fraction (Dr. Perry), Roger Pretto (Vocar)
• Featuring: Holly Ann Butler (Bethmay), Crew Preston (Jackben), Robert Catrini (Customs Agent), Jack Harrell (Chief Justice), Frank Welker (Special Vocal Effects)
• Written By: Carleton Eastlake
• Directed By: Oscar L. Costo

• Special Guest Star: Roy Scheider (Captain Nathan Bridger)
• Guest Starring: Michael Costello (Secretary General McGath)
• Co-Starring: Karen Fraction (Dr. Perry), Peggy O'Neal (Dr. Johansen)
• Featuring: Robert Small (U.E.O. Surgeon General), Eric Miles (McGath's Aide), Frank Welker (Special Vocal Effects)
• Written By: Naren Shankar & Javier Grillo-Marxuach
• Directed By: Anson Williams

• Guest Starring: Jonathan Banks (Max Scully), Michael Costello (Secretary General McGath), Patricia Charbonneau (Elaine Morse)
• Featuring: Dan Matisa (Tyler), Kathy Alzado (Holo Woman), Pauline Locsin (Ecotopian), Frank Welker (Special Vocal Effects)
• Written By: Lee Goldberg & William Rabkin
• Directed By: Oscar L. Costo

• Special Guest Star: Roy Scheider (Captain Nathan Bridger)
• Guest Starring: Michael Costello (Secretary General McGath)
• Co-Starring: James Mathers (Verachek), Andrew Stahl (General Armand Stassi)
• Featuring: Candice Critchfield (Supervisor), Dan Bright (Technician), Steve Mastro, Jr. (Matthew), Frank Welker (Special Vocal Effects)
• Written By: Naren Shankar
• Directed By: Jesús Treviño

• Guest Starring: Terence Knox (Commander Michael VanCamp), Brittany Murphy (Christine VanCamp)
• Co-Starring: Karen Fraction (Dr. Perry)
• Featuring: Kathy Poling (Ellen VanCamp), Dorothy Keller (Elder Christine), Paul Vroom (Lieutenent Commander Trask), Hank Stone (Marine Sergeant), Lee Miller Dawson (Ross), Chris Edgerly (Ross's Friend), Frank Welker (Special Vocal Effects)
• Written By: Carleton Eastlake
• Directed By: Frederick K. Keller

• Special Guest Star: Michael York (President Alexander Bourne)
• Guest Starring: Tim DeKay (Lawrence Deon), Michael Costello (Secretary General McGath)
• Co-Starring: Ralph Wilcox (Mason Freeman), Tom Nowicki (Dr. Slaussen), Michael Deeg (Noonan), Chris Miles (Nichols)
• Featuring: Nancy Duerr (Session Speaker), Oscar Corbella (Chilean Representative), Phyllis Fludd-White (Chad Delegate), Sean Mahabir (South American Delegate), Bryan Friday (Waiter), Michele T. Carter (Reporter #1), Steve Howard (Reporter #2), Frank Welker (Special Vocal Effects)
• Written By: Clifton Campbell
• Directed By: Jesús Treviño

• Guest Starring: Dennis Christopher (), John H. Brennan (John Pardee)
• Co-Starring: Ralph Wilcox (Mason Freeman)
• Written By: Carleton Eastlake
• Directed By: Anson Williams

• Guest Starring: Julia Nickson (Lieutenent Commander Heiko Kimura), Michael Costello (Secretary General McGath)
• Co-Starring: Karen Fraction (Dr. Perry)
• Featuring: Traber Burns (Captain John Corey), Jody Kiel (Commander Vargas), David B. Fang Yuen (Chaodai Pilot)
• Written By: Javier Grillo-Marxuach
• Directed By: Steve Beers