Back to the Future’s Doc Brown and Principal Strickland stage a hilarious reunion 40 years after the classic movie’s release. Christopher Lloyd playedBack to the Future’s mad genius best friend of Michael J. Fox’s time-hopping Marty McFly. A familiar face from scores of ‘80s classics, James Tolkan was perfectly cast as the follically-challenged disciplinarian in charge of Hill Valley High School, both in 1955 and 1985.