BBC has put online and available to watch for free the documentary Slipknot Unmasked: All Out Life, a hour-long film about the highs and lows of Slipknot career.

In the documentary, fans are guided through different parts of band’s career, from Grammy Awards and album sales to substance abuse issues and the loss of bassist and songwriter Paul Gray.

Also, it features an intimate performance from the band, exclusive interview clips and backstage access.