text: Their aversion to gold was not mentioned until their attempt to destroy the planetoid Voga ( the so-called `` Planet of Gold '' ) in Revenge of the Cybermen ( 1975 ) .
simplified: It was not mentioned that they did not like gold until their attempt to destroy the planetoid Voga ( the so-called `` Planet of Gold '' ) in Revenge of the Cybermen ( 1975 ) .