BBC News special correspondent Fergal Keane has covered conflict and brutality for more than 30 years and is known for reporting with humanity and extraordinary empathy, but in 2020 revealed he had been diagnosed with an acute form of post-traumatic stress disorder. In this Horizon documentary, he reveals the impact of PTSD on his life, exploring how it led him to consider withdrawing from reporting on conflicts, as well as investigating the latest scientific thinking behind its treatment.