Free on Yahoo View (from Hulu)

At the time of this post, Evacuate Earth is available
free on Yahoo View (content provided from Hulu).

https://view.yahoo.com/show/mars/episode/60775131/evacuate-earth

(Confusingly, the show is presented as a sort of teaser for the new upcoming
"Mars" series, but of course Evacuate Earth is actually not part of that series.)