The Podcast Hour for Saturday 16 March 2019 (radio broadcast 23.3.19)

Karaoke battles on giant container ships, David Walliams wants to get more kids into classical music, a show that's just one guy going for a walk, a Parisian podcast telling the French capital's hidden histories, and talk show host Conan O' Brien chats to some of the biggest names in showbiz to see if they'll be his friend.