Currently available on 2 streaming services.

JustWatchTV
Stream Free
First Signal

First Signal - watch online: streaming, buy or rent

You can buy "First Signal" on Apple TV as download or rent it on Apple TV online.

Cast

Paul Noonan
General John Reager
Conor Timmis
Cedric Yonah
Wendy Hartman
President Helen Colton
Patience McStravick
Major Ellen Sampson
Stephanie Eaton
Elisabeth Seward