Doc Emmett Brown (actor: Chirstopher Lloyd) is a scientist a best friend of Marty McFly in the Back to the Future trilogy. He is also the inventor of the DeLorean Time Machine that Pooh and friends will use in their adventures with him and Marty.
- Doc made his first guest appearance in a Winnie the Pooh crossover and met Winnie the Pooh, Tennessee Tuxedo, Ash Ketchum, Simba, and their friends in Pooh's Adventures of The Little Drummer Boy.
- Doc guest starred again in Pooh's Adventures of The Little Drummer Boy, Book II.
- Doc will see Pooh, Ash, Tennessee, and their friends again in Winnie the Pooh Goes Back to the Future and its sequels.
- Doc will see Simba, Timon, and Pumbaa again and meet Littlefoot, SpongeBob SquarePants, Stan Marsh, and their friends in Littlefoot Goes Back to the Future.
- Doc will meet Team Robot in Team Robot In Back To The Future.
- Doc Emmett Brown is also an old best friend of Mucker.
- Doc will guest star again in the Winnie the Pooh/Ice Age saga.