Real life missionary invention -- flying car! His father died in evangelizing Ecuador natives-- dramatized in the movie: End of the Spear.
Most "Catholic" countries in South America have made it illegal to have contact with tribes deep in Jungle. (The Star Trek policy of non-intervention.) God in his mercy has sent Protestants to get the saving waters of Baptism to these people, since Catholics have no interest in their salvation--God has provided. They learn the necessity of Jesus as Lord and Savior, for salvation. Hopefully they will receive enough"Catholic" Faith to save them-- like children as long as they put no obstacle to grace.