Robert Plant's Digging Deep podcast has returned for its fourth season. He and co-host Matt Everitt pick up their conversation on the season opener with "Bluebirds Over the Mountain," a song written and recorded by Ersel Hickey in 1958 and made a hit by Ritchie Valens that same year. Plant recorded a version for his 2017 Nonesuch album, Carry Fire, with guest vocalist Chrissie Hynde. You can hear the podcast episode and watch the video for Plant's take on the song below.

"When I was a kid, we were all really aware of the American sound," Plant says on the episode. "It was a such a radical difference, the recording sounds. I wouldn't have been able to put my finger on what it was then. But there was an urgency about rock and roll in 1959—I was eleven years old then—so a lot of these songs from that era carried so much purchase against what we were trying to do over here. I wasn't in a group, I wasn't even thinking about singing. I was just starting a huge attraction to music."