- James McDaniel - General Beers
- Julie Ann Emery - Amelia Keys
- Desmond Harrington - Jesse Keys
- Brian Markinson - Ray Morrison
- Roger Cross - Captain Walker
- Nathaniel DeVeaux - Dale Watson
- Emily Holmes - Julie Crawford
- Ryan Hurst - Tom Clarke
- Andy Powers - Eric Crawford
- Catherine Dent - Sally Clarke
- John Hawkes - Marty Erickson
- Eric Close - John
- Steve Burton - Russell Keys
- Chad Morgan - Becky Clarke
- Tina Holmes - Anne Crawford
- Jason Gray-Stanford - Howard Bowen
- Elle Fanning - Allie at 3 yrs
- Julie Benz - Kate Keys
- Ken Camroux-Taylor - Luke Reynolds
- David Paetkau - Buzz
- John B. Lowe - Dr Findlay
- Steve Makaj - Sweatshirt Guy
- Terry David Mulligan - Interviewer
- Dean Wray - Ronnie
- Sadie Lawrence - Carol Clarke
- Byron Lucas - Danny Holding
- Jeff Topping - Orbital Analyst
- James Kirk - Jesse Keys (Teen)
- Antonio Cupo - Guitar Player
- Joe MacLeod - Docent
- Alexandra Purvis - Lisa at 13 yrs
- Willie Garson - Dr. Kreutz
- Anton Yelchin - Jacob Clarke (Child)
- Anton Yelchin - Jacob Clarke
- Eileen Pedde - Nora
- Ian Tracey - Bill Walker
- Tom Heaton - Ben
- Rondel Reynoldson - Dorothy
- Brenda James - Dr. Ellen Greenspan
- Don Thompson - Pete
- Kurt Max Runte - Roadblock Soldier
- Alison Matthews - News Reporter
- Peter Bryant - Tech on Monitors
- Taylor Reid - Lisa Clarke (Child)
- Taylor Reid - Young Lisa
- Justin Chatwin - Clauson
- Tim Henry - Used Car Salesman
- Linda Ko - Cynthia
- Devin Douglas Drewitz - Charlie Keys (Child)
- Devin Douglas Drewitz - Young Charlie
- Anysha Berthot - Mary Crawford (Child)
- Anysha Berthot - Young Mary
- Michael Soltis - Lt. Pierce
- Michael Soltis - Lt Pierce
- Ben Cotton - Denny
- Roger Haskett - Man in Crowd
- Shawn Reis - National Guard Soldier
- Timothy Webber - Dewey Clayton
- Ty Olsson - Superior Fish Tech
- Alonso Oyarzun - Lt. Keel
- Alonso Oyarzun - Lt Keel
- Wendy Russell - Woman in Crowd
- Max Martini - Colonel Breck
- Chad Donella - Jacob Clarke
- Chad Donella - Jacob Clarke (Adult)
- Chris Cound - Milo
- Mark Shera - Radio Caller
- Gabrielle Rose - Dr. Harriet Penzler
- Sam Easton - Doofus
- Bob Wilde - Carny
- Tobias Mehler - Lt. Williams
- Michael Jeter - Bill Jeffries (voice) (uncredited)
- Michael Jeter - Bill Jeffries
- Sergio Mimica-Gezzan
- Steve Beers
- Darryl Frank
- Joe M. Aguilar
- Leslie Bohem
- Richard Heus
- Steven Spielberg
Justin Chatwin hace el papel de Clauson.
Dakota Fanning interpreta a Allie Keys en la serie.
Matt Frewer interpreta a Dr. Chet Wakeman en la serie.
Emily Bergl interpreta a Lisa Clarke en la serie.
Heather Donahue interpreta a Mary Crawford en la serie.
Joel Gretsch interpreta a Owen Crawford en la serie.
Adam Kaufman interpreta a Charlie Keys en la serie.
John Hawkes interpreta a Marty Erickson en la serie.
Ryan Hurst interpreta a Tom Clarke en la serie.
Camille Sullivan interpreta a Nina Toth en la serie.
Capítulo disponible en las siguientes plataformas:
