What is the climax of the next voice you hear?

I assume you mean the (religious) film made around l950 and once staple (dead time) fare late in the wee hours, often around holidays. I seem to recall there are two different versions of this film, with two different endings. In one the Cosmic Voice suddenly suspends broadcasting, and things go back to normal, in another there is a sort of counter-revolution in Russia, there are some hints by means of photos of a distant transmission station in some remote country, that the broadcasts are not real but faked. All ends well ( except if you are into Version II- the KGB and Comrades). The film does more or less intelligently blend a religious theme with everyday reality- but is not science fiction.