From influencers gone (really, really) bad and the outrageous Joe Exotic to the greatest reveal in television history – here are Guardian readers’ favourite real-life documentaries and whodunnits

I watched the BBC’s Unsolved: The Boy Who Disappeared when it came out and Damien Nettles, its subject, still pops up in my mind sometimes. It’s a comprehensive, empathetic and gripping investigation into a case I had never heard of. The Serial/Making a Murderer-style approach of showing the investigation, rather than just presenting information, gives the series a much more human angle. I thought it might turn up new evidence; that level of faith in the work being shown is a testament to how thorough it was. AJ, Devon, UK