Back to the Future S01 E11 Dickens of a Christmas

"The time travelling adventures of Doc Brown, his family, and his friend, Marty McFly."

It's Christmas time so the Brown family and Marty go to 1800s London to celebrate. Unfortunately, the boys lose the key to the DeLorean to a pickpocket and Clara, a toy shop manager and his family get thrown into prison by Ebiffnezer Tannen.