- Sky Master: Why should we attempt to locate the hiding place of the secret chemical formula for the invisibility serum, which the Robinson laboratories are preparing for the government? When we can force the formula from Robinson's lips by kidnapping his only son and holding him captive. The miserable Earth-dwellers, how I abominate them and their stupid laws. The police and the courts sought to outlaw me, and to frustrate my plans to free the Earth-dwellers from their miserable existence, crawling like worms in the mud over the surface of the world, when the skies lie open above. But I will show them all.