Richie Kohler: The “Deep Sea Detective” speaks about the Britannic, the Titanic, U869 and his Hollywood movie Interviews, Shipwrecks. By Pierre Kosmidis. Richie Kohler is a familiar figure to millions of people worldwide, through his TV Show “Deep Sea Detectives”, hosted together with John Chatterton on History Channel. A team of detectives, alongside veteran divers John Chatterton and Richie Kohler, look back at history’s mysteries and wrecks at sea in this week's HISTORY Vault featured collection, Deep Sea