Cas Anvar as Alex on The Expanse, taking a moment to think.

Cas Anvar, who plays Alex on The Expanse. The Expanse is in its 3rd season.

Cas Anvar, who plays as Alex on The Expanse. The Expanse is in its 3rd season.

Alex, Chrisjen and Jim on the ship, season 3 of The Expanse

Avasarala and Bobbie seek refuge on the Rocinante on The Expanse. "Assured Destruction" is the third episode of the show's third season.