When a hotel magnate builds a hotel over a meteor crash site he reckons without the alien beings inside the "meteor", as it is really a spaceship, building an extra elevator in his hotel as a means back to space.; Parallel world doppelgangers invade.; A man takes his friend for a visit in a miniature Alpine village.; Six divers go down, but seven come up. When the leader removes his mask, and demands that the others do so as well, the others panic as they are mermen and the normal looking diver leader appears as a freak to them.; A freighter on Mars sends out an SOS that is received by an Earth ship.