Matt Simmons
Peter Bartlett
Wing Commander Hayes
Garry the Alien
Dennis (as Zachary Garred)
Amelia Chambers
Captain Wessex
Marcus Chambers
Bud Miller
Steve the Alien (voice)
Isabella Bartlett
Squad Leader Robin Sigiro
Abraham
Jacob
Suarez
High Female Elder / Vidargh (Garry's Wife) (as Eliza D'Souza)
Katherine Hayes
Zorro Wingman
Radio Operator
Bio Room Technician
Kid Spy
Lieutenant Bryson
Commando 1 / AZ
Captain Bayley / Alien Informant / Uber Kali
Little Alison
Door Guard
Garry's Child
Commando 2
Garry the Alien Double
Jenny Bartlett
Samuel Bartlett (as Rhylan Bush)
Steve the Alien Suit Performer
Australian Soldier
Hayes Soldier
Villager / Torch Bearer (credit only)
Villager
Refugee / Captured Human
Refugee (uncredited)
Villager Child (uncredited)
Refugee Child (uncredited)
Hayes Guard (uncredited)
Villager (uncredited)
Soldier (uncredited)
Soldier / Alien (uncredited)
Soldier / Refugee (uncredited)
Pilot (uncredited)
Kid Spy (uncredited)
Hayes' Staff / Missile Tech (uncredited)
Commando (uncredited)
Refugee / Captured Human (uncredited)
Tunnel refugee (uncredited)
Villager Mother (uncredited)
Police Officer (uncredited)
SAS Soldier (uncredited)
Army Officer (uncredited)
Alien Child (uncredited)
Background Artist (uncredited)
Villager #1 (uncredited)
Airforce Officer (uncredited)
Villager Boy (uncredited)
Alien (uncredited)
Soldier / Villager / Commando / Freedom Fighter (uncredited)
Soldier in Yellow Goggles (uncredited)
Hayes Staff (uncredited)
Background Extra (uncredited)
Refugee / Villager (uncredited)