- Ep: 1/2
- First Contact
- Narrator: Devon Adair
- Also Starring: Richard Bradford (Commander Broderick O'Neill)
- Featuring: Beth Colt (Newscaster), Hedy Thom (Controller #1), John Verea (Controller #2), Marcia Firesten (Navigator), Brian Steele (Terrian #1), Russell Werkman (Terrian #2), David Elliot (Crew #1), Joe Bradley (Crew #2), Christopher Sutton (Crew #3)
- Teleplay By: Michael Duggan & Carol Flint & Mark Levin
- Story By: Billy Ray & Michael Duggan & Carol Flint & Mark Levin
- Directed By: Scott Winant
- Ep: 3
- The Man Who Fell to Earth (Two)
- Narrator: John Danziger
- Special Guest Star: Tim Curry (Gaal)
- Guest Starring: Richard Bradford (Commander Broderick O'Neill)
- Written By: Mark Levin
- Directed By: Felix Enriquez Alcala
- Ep: 4
- Life Lessons
- Narrator: True Danziger
- Special Guest Star: Tim Curry (Gaal)
- Featuring: Jeff Deist (Grendler #1), Lisa Ebeyer (Grendler #2)
- Written By: Jennifer Flackett
- Directed By: Daniel Sackheim
- Ep: 5
- Promises, Promises
- Narrator: Alonzo Solace
- Special Guest Star: Tim Curry (Gaal)
- Featuring: Brian Steele (Terrian #1), Russell Werkman (Terrian #2)
- Written By: P.K. Simmonds
- Directed By: Felix Enriquez Alcala
- Ep: 6
- A Memory Play
- Narrator: Devon Adair
- Guest Starring: Julius Carry (Les Firestein), LaTanya Richardson (Alex Wentworth)
- Featuring: Jeff Deist (Grendler #1)
- Written By: Mark Levin & Jennifer Flackett
- Directed By: Deborah Reinisch
- Ep: 7
- Natural Born Grendlers
- Narrator: Yale
- Teleplay By: Jennifer Flackett & P. K. Simonds
- Story By: Carl Cramer & David Solmonson
- Directed By: Michael Grossman
- Ep: 8
- Water
- Narrator: Bess Morgan
- Guest Starring: Terry O'Quinn (Reilly)
- Featuring: Brian Steele (Terrian #1), Russell Werkman (Terrian #2)
- Written By: Carol Flint
- Directed By: Joe Napolitano
- Ep: 9
- The Church of Morgan
- Narrator: Julia Heller
- Guest Starring: Terry O'Quinn (Reilly)
- Written By: Michael Duggan
- Directed By: Joe Napolitano
- Ep: 10
- The Enemy Within
- Narrator: Julia Heller & Devon Adair
- Guest Starring: Terry O'Quinn (Reilly)
- Featuring: Brian Steele (Terrian #1), John David Garfield (Jesse James), Clifford Happy (Frank James)
- Written By: Eric Estrin & Michael Berlin
- Directed By: John Harrison
- Ep: 11
- Redemption
- Narrator: Devon Adair
- Guest Starring: Terry O'Quinn (Reilly), Jeff Kober (The Z.E.D.)
- Written By: Arthur Sellers
- Directed By: Joe Ann Fogle
- Ep: 12
- Moon Cross
- Narrator: Alonzo Solace
- Guest Starring: Kelli Williams (Mary)
- Featuring: Brian Steele (Terrian #1), Russell Werkman (Terrian #2), Laurie Ciarametaro (Mary's Mother), Kevin Wiggins (Mary's Father)
- Written By: Carol Flint
- Directed By: Sandy Smolan
- Ep: 13
- Better Living Through Morganite
- Narrator: Morgan Martin
- Featuring: Brian Steele (Terrian #1), Russell Werkman (Terrian #2)
- Written By: P.K. Simonds
- Directed By: Jim Charleston
- Ep: 14
- Better Living Through Morganite, Part 2
- Narrator: Morgan Martin
- Guest Starring: Kelli Williams (Mary)
- Featuring: Brian Steele (Terrian #1), Russell Werkman (Terrian #2), David Elliot (Soldier), Leslie Cook (Woman), Patrick Henry Finnegan (Newscaster)
- Written By: P.K. Simonds
- Directed By: Frank DePalma
- Ep: 15
- Grendlers in the Mist
- Narrator: John Danziger
- Guest Starring: Tim Ransom (Whalen), Francia Di Mase (Dell Curry)
- Featuring: Jeff Deist (Grendler)
- Written By: Heather MacGillvray & Linda Mathious
- Directed By: Janet Davidson
- Ep: 16
- The Greatest Love Story Never Told
- Narrator: None
- Guest Starring: Patrick Bauchau (Sheppard), Lilyan Chauvin (Katrina), Andrew J. Ferchland (Ragamuffin), Roy Dotrice (The Elder)
- Featuring: Brian Steele (Terrian #1), Russell Werkman (Terrian #2), Ivan Schwarz (Ivan), Dain Turner (Larken)
- Written By: Mark Levin & Jennifer Flackett
- Directed By: James Frawley
- Ep: 17
- Brave New Pacifica
- Narrator: None
- Featuring: Jeff Deist (Grendler #1), Lisa Ebeyer (Grendler #2)
- Written By: Carol Flint
- Directed By: Joe Napolitano
- Ep: 18
- The Boy Who Would Be Terrian King
- Narrator: Ulysses Adair
- Guest Starring: Michael Reilly Burke (Future Uly), Nicholas Sadler (Max)
- Co-Starring: Kathy Molter (Future True)
- Featuring: Brian Steele (Terrian #1), Russell Werkman (Terrian #2), Tierre Turner (Prison Guard), Mike McCoy (Main Guard), Karen Whittle (Security Guard)
- Written By: Heather MacGillvray & Linda Mathious
- Directed By: Jim Charleston
- Ep: 19
- After the Thaw
- Narrator: Alonzo Solace
- Guest Starring: Roy Dotrice (The Elder)
- Co-Starring: Andrew J. Ferchland (Ragamuffin)
- Featuring: Jeff Deist (Grendler #1), Lisa Ebeyer (Grendler #2)
- Written By: Théo Cohan
- Directed By: Michael Grossman
- Ep: 20
- Survival of the Fittest
- Narrator: John Danziger
- Featuring: Jeff Deist (Grendler)
- Written By: John Harrison
- Directed By: John Harrison
- Ep: 21
- Flower Child
- Narrator: Morgan Martin
- Featuring: Jeff Deist (Grendler)
- Written By: Carl Cramer
- Directed By: Jim Charleston
- Ep: 22
- All About Eve
- Narrator: Julia Heller & Devon Adair
- Guest Starring: Terry O'Quinn (Reilly), Christopher Neame (Dr. Franklin Bennett), Margaret Gibson (Elizabeth Anson)
- Featuring: Hedy Thom (Eve), Erin Murphy (Eben Synge)
- Written By: Robert Crais
- Directed By: John Harrison
| Debrah Farentino ................ Devon Adair |  |
| Clancy Brown .................. John Danziger |  |
| Sullivan Walker ........................ Yale |  |
| Jessica Steen .............. Dr. Julia Heller |  |
| Rebecca Gayheart ......... Bess Amelia Martin |  |
| John Gegenhuber ....... Morgan Horatio Martin |  |
| Joey Zimmerman .......... Ulysses "Uly" Adair |  |
| J. Madison Wright ............. True Danziger |  |
| Antonio Sabato, Jr. ........... Alonzo Solace |  |
| Tierre Turner .......................... Zero |  |
| Walter Norman ........................ Walman |  |
| Marcia Magus .......................... Magus |  |
| Rockmond Dunbar ...................... Baines |  |
| Kirk Trutner ........................ Cameron |  |
