"TED Radio Hour," a journey through the world of extraordinary ideas, is getting more air time. Co-producers NPR and TED are expanding "TED Radio Hour" to a weekly program, with a new host, NPR's Guy Raz. The show has aired on more than 255 NPR Member stations since its debut as a 10-episode pilot earlier this year. The new season begins in March. Raz joins TED Radio Hour from All Things Considered, where he’s been the weekend host since July 2009. All shows are also available as a podcast, on NPR’s mobile apps and Web site.