Stories about radio - Listening to ghosts & Keep them guessing

Two stories about radio. In the past, radio was the most ephemeral of all media or art-forms. It's invisible, evanescent—it passes by the ear and is gone, yet radio can leave deep sound prints - memories of listening that can reverberate over decades.

Plus, trying to unravel the secret behind one of the most popular radio shows of the 20th century, as a grandson  tries to find out how his grandparents read people's minds. A story about magic,illusion and the creative power of radio.