By Jessica Derschowitz
September 12, 2015 at 08:16 PM EDT

Donald Glover had to learn a lot of science for his role in Ridley Scott’s space epic The Martian, but you might not want to rely on him should you actually find yourself stranded out in the universe.         

“I know a little bit about orbit, but not enough to sustain — or save — anyone,” the actor told JD Heyman at PEOPLE, InStyle and Entertainment Weekly’s photo studio at the Toronto Film Festival.

Glover stars in The Martian as part of an all-star cast that includes Matt Damon, Jessica Chastain, Chiwetel Ejiofor, Jeff Daniels, Michael Pena, Kate Mara, Sebastian Stan, and Sean Bean.

Watch the video above for more on Glover’s role as the “science geek” of the film and why you shouldn’t call him for help if you’re lost in space. 

Related Stories

The cast of The Martian reveals the most difficult part of making Ridley Scott’s space epic

See the first reactions to Matt Damon’s The Martian

TIFF 2015: Matt Damon & Jessica Chastain on space and the science of The Martian

WANT MORE EW? Subscribe now to keep up with the latest in movies, television and music.

2015 movie
  • Movie
  • PG-13
  • 142 minutes
Complete Coverage