On the DVD of 20 Million Miles to Earth there is a different documentary about the career of Ray Harryhausen. It has some different graphics and interviews, but many of the same anecdotes across the timeline of Harryhausen's life. I watched this one on Netflix. What it contains that the other lacks are interviews with filmmakers like Peter Jackson, Steven Spielberg, Tim Burton, and Guillermo del Torro, as well as other effects artists who talk about the influence that Harryhausen's creatures had on them. And Harryhausen speaks for himself quite often.