This week on the io9 show, we ask why it is that NASA can put a robot on Mars, but Hollywood can't make any realistic movies about the red planet. We examine the worst Mars movies ever, and special guest Phil Plait (the good astronomer behind the Bad Astronomy blog) helps us figure out how realistic they are. Actually, you might be surprised what gets high marks for realism and what doesn't.

Be sure to catch more episodes of the io9 show on our YouTube page!