(video) The Establishment: ‘The Flinstones’ Theme On June 10, 2017 By Jeff FenskeIn MUSIC Videos That Matter I’m not a fan of the show, but it’s amazing what four voices can do together! – – The Establishment – The Flinstones Theme Trevor Bruger Published on Jun 14, 2015 The Establishment sing in the Sunshine Region show after winning the Open Quartet Contest