Currently available on 3 streaming services.

Alpha - watch online: streaming, buy or rent

You can buy "Alpha" on Apple TV, SF Anytime, Viaplay as download or rent it on Apple TV, Viaplay, SF Anytime online.

Cast

Kodi Smit-McPhee
Keda
Jóhannes Haukur Jóhannesson
Tau
Marcin Kowalczyk
Sigma
Jens Hultén
Xi
Natassia Malthe
Rho
Spencer Bogaert
Kappa
Mercedes de la Zerda
Nu
Leonor Varela
Shaman Woman
Priya Rajaratnam
Huntress (uncredited)
Michael Kruse-Dahl
Lion Tribe #4 (uncredited)
Kyle Glenn Thomas
Lion Tribe #9 (uncredited)
Louis Lay
Solutrean Hunter #2 (uncredited)
Patrick Flanagan
Solutrean Hunter #3 (uncredited)
Blake Point
Solutrean Hunter #4 (uncredited)
Taran Kootenhayoo
Solutrean Hunter #6 (uncredited)