BBC Radio: Sherlock Holmes - The Problem of Thor Bridge The Problem of Thor Bridge is a Sherlock Holmes murder mystery by Arthur Conan Doyle in The .\rbr\rbr\rbr\rbrSOUs Raider Radio presents Sherlock Holmes and the Problem of Thor Bridge -Radio Play(2012)\rbr\rbrFull and unabridged audiobook. The complete canon of Sherlock Holmes by Sir Arthur Conan Doyle. From short story collection The Case-Book of Sherlock .