The Final Frontier is the twelfth episode of the second season of Designated Survivor and the thirty-third episode overall. It aired on March 7, 2018.
A missile intended to bring water to stranded astronauts in space is hacked; President Kirkman must work with Russia to help save lives and find out who is behind the hack; Hannah finds herself working with Damian again.
- Kiefer Sutherland as Tom Kirkman
- Natascha McElhone as Alex Kirkman
- Paulo Costanzo as Lyor Boone
- Adan Canto as Aaron Shore
- Italia Ricci as Emily Rhodes
- LaMonica Garrett as Mike Ritter
- Zoe McLellan as Kendra Daynes
- Ben Larson as Damian Rennett
- Kal Penn as Seth Wright
- Maggie Q as Hannah Wells