Mandolin great Chris Thile is set to take over for Garrison Keillor on “A Prairie Home Companion.” We revisit our recent conversation about what the new host has planned, and listen to him perform a song.

After 40 years of tales from the fictional town of Lake Wobegon, Garrison Keillor is calling it quits. “Chicago Tonight” talks with Chris Thile about taking over as host of "A Prairie Home Companion," his bands and more.