Mick Jagger by Jun Sato/WireImage.com Mick Jagger by Jun Sato/WireImage.com

In The FBI at 100, a BBC documentary premiering Monday, a former fed reveals that the Hells Angels plotted to snuff Mick Jagger after the Rolling Stones frontman dissed the biker group's handling of security at the 1969 Altamont Speedway concert, where a fan was stabbed.

When Jagger declared the Angels would never work a Stones gig again, "[They] were so angered... that they decided to kill him," says doc host Tom Mangold. "A group of them took a boat and were all tooled up... to attack [Jagger's Hamptons vacation home] from the sea." The would-be killers would get no satisfaction, however, as a storm swept them overboard, and the plot was foiled. Jagger has not yet commented on the documentary.