stefan gunther, a german pilot and father of three. >> i want to go there. to pay the price. >> reporter: and sue ann. >> i feel like it's my destiny to colonize mars. >> reporter: a tech worker from california. >> i think i would be completely crushed if i found out i didn't make it. >> reporter: the three hopefuls competing to make the cut for the next mars 1 selection round. only 100 potential astronauts will be chosen. and they'll find out any day now. the first launch date is set for 2024. >> i've told so many people about this story. and the reaction that i get almost every time is are you crazy? >> we're already doing this. so accept the new reality. >> reporter: we bet landsdorf, the 38-year-old ceo of mars 1, in his small office outside amsterdam. he and his team of space experts claim they can do what nasa so far has not. >> the humans will leave effort arriving on mars april 2023. >> reporter: an entrepreneur by trade, he believes mars 1's multi-billion dollar mission can be funded by selling tv rights to the reality show. >> literally everybody o