Summary
Doc, Marty Junior, and Suzy end up in a Tannenized 2015. Doc and MJ must go back to 1985 to fix the mess. However, things get complicated when their actions in 1985 start erasing Marlene from existence and Doc goes to 1914. Now, Marty Junior needs to save Doc from being killed in 1915- but many crazy events delay their return to 2015.