It wasn't until 1991 that PolyGram started taking a greater interest in the original series, and the foundations were laid for events which would come to pass in later years. They began by purchasing Propaganda Films (who were responsible for Turbocharged Thunderbirds' production and effects) and closing the Channel 5 division to release the series themselves, along with four new compilation tapes. In their final takeover move, the company would go on to buy out ITC Entertainment's film and video library for $156 million dollars, effective January 1st 1995.