Subscribe to TRAILERS: br Subscribe to COMING SOON: br The Host Official Trailer #2 (2013) - Saoirse Ronan Movie HDbr br A parasitic alien soul is injected into the body of Melanie Stryder. Instead of carrying out her race's mission of taking over the Earth, "Wanda" (as she comes to be called) forms a bond with her host and sets out to aid other free humans.