Claim: Christopher Lloyd has done extensive acting work.

Christopher Allen Lloyd -LRB- born October 22 , 1938 -RRB- is an American actor , voice actor and comedian best known for his roles as Emmett `` Doc '' Brown in the Back to the Future trilogy , Judge Doom in Who Framed Roger Rabbit -LRB- 1988 -RRB- , Merlock the Magician in DuckTales the Movie : Treasure of the Lost Lamp -LRB- 1990 -RRB- , Uncle Fester in The Addams Family -LRB- 1991 -RRB- and its sequel Addams Family Values -LRB- 1993 -RRB- , and Grigori Rasputin in Anastasia -LRB- 1997 -RRB- .   Lloyd has an equally prominent television profile , having won two Primetime Emmy Awards for playing Jim Ignatowski on the comedy series Taxi -LRB- 1978 -- 1983 -RRB- . He earned a third Emmy for his 1992 guest appearance on Road to Avonlea . He has also done extensive voiceover work for animated programs , most notably voicing The Hacker on the PBS Kids series Cyberchase -LRB- 2002 -- 2015 -RRB- . The role earned him two Daytime Emmy Award nominations .