Serial, the hit podcast in which journalist Sarah Koenig investigated the conviction of Adnan Syed for the 1999 murder of Hae Min Lee, has concluded its first series. It has been the most successful podcast ever, but it has also raised a lot of questions about journalism ethics, the role of social media in sensitive stories, and the future of the podcast form. After listening to the final episode, Sarah Gordon, the FT's business editor; Helen Warrell, FT public policy correspondent; Sarah O'Connor, employment correspondent, and Shannon Bond, US media and marketing correspondent, react to the questions left unanswered by the innovative series. For information regarding your data privacy, visit acast.com/privacy