Is MARS coming back?

No — MARS ended on December 16, 2018, after its second season on National Geographic.

MARS was a science-fiction drama series that aired from 2016 to 2018. The show was a blend of scripted storytelling set in the future and documentary-style interviews with real scientists and innovators, exploring humanity's first crewed mission to Mars. It depicted the final moments before landing on the red planet and the efforts to establish a sustainable colony, combining action, drama, and educational content.

The series featured a cast including Sammi Rotibi as Robert Foucault, Jihae as Hana Seung and Joon Seung, Clementine Poidatz as Amelie Durand, Alberto Ammann as Javier Delgado, Anamaria Marinca as Marta Kamen, Cosima Shaw as Leslie Richardson, and Olivier Martinez as Ed Grann. It received a rating of 7.5 on TVMaze and each episode ran approximately 60 minutes.