Article continues below advertisementJune 30, 2005: Patrick McDermott Disappeared During an Overnight Fishing TripSource: MEGAPatrick McDermott disappeared 20 years ago.Patrick McDermott's disappearance 20 years ago remains a mystery that continues to leave many questioning what truly happened.On June 30, 2005, the cameraman, who dated Olivia Newton-John on and off for about nine years, went on an overnight fishing trip off the coast of California. He told his friends he would be back the following day, but he was never seen again after leaving San Pedro port.