Spacecraft Epsilon keeps one's ears open without lengths or weaknesses or inconsistencies. After the first part, I initially held their breath, "Oh no, traces of"? How is that going out without implausible or absurd in the children's fantasies of the author or director to go down, as with so many (some famous) movies ??? ". But the concern is unfounded, the intentions of the "aliens" and the people here are absolutely convincing (if we can imagine the primitive worms in our view) and never shown ridiculous and also the end is coherent and logical for all concerned. One of the best science fiction "aliens representations" that I know of. And one of the best radio play Mark Brandis consequences.