Red Hot Chili Peppers bassist Flea is a hell of a character as himself, but the master of the four-string portrayed the character Douglas J. Needles for 'Back to the Future II' and also in 'Back to the Future III.'

You may not have caught Flea in 'Back to the Future II,' as he was caked in old man makeup while convincing an aging Michael J. Fox to participate in a shady business deal.

Flea looked a bit more like himself in the third film, where he hyperactively challenges Fox to a drag race, unknowingly altering the future of the protagonist.