Cash tries to find his voice; and a tape-recorder mistake inspires a riff.

The stories behind the Johnny Cash song "Ring of Fire."

A behind-the-music look at the song "Jackson," released by Johnny Cash and June Carter in 1967.

The stories behind the song "A Boy Named Sue," written by Shel Silverstein and made famous by Johnny Cash.

The song "Sunday Morning Coming Down," written by Kris Kristofferson and performed by Johnny Cash, is explored. Interviewees include Kristofferson.

Johnny Cash's interpretation of the Nine Inch Nails song "Hurt" is examined, with Trent Reznor lending insight.