Seeing and navigating patterns of ‘undiscussables’: the implications of Saville, Snowden and whistleblowing for OD practice. Steve Hearsum, Roffey Park Institute The recent revelation that Jimmy Saville may have abused in the region of 1,000 people during his time at the BBC, and with the knowledge of colleagues who did not challenge and/or report his behaviour, brings into focus once more the ability of people, and the organisations they work in, to address behaviour and/or practices that might be construed as unacceptable at best, and criminal at worst. The above is evidence of what Peter Egan calls the shadow side of organisations, namely: “The covert, the undiscussed, the undiscussable, and the unmentionable. It includes arrangements not found in organisational manuals and company documents or on organisational charts.” (1994, p4) What prevented those around Saville from breaking the taboo that such a figure was unchallengeable? This presentation was given at the ODN Europe Conference during May 2014.