Of course! The Back to the Future series consists of three movies, and the timeline can be a bit confusing due to the time travel. Here's a simplified breakdown of the timeline in chronological order:

### Back to the Future (1985)

- **1985:** Marty McFly, the protagonist, lives in Hill Valley, California.
- **1955:** Marty accidentally travels back in time to 1955 using Doc Brown's time machine (a DeLorean car) and interferes with his parents' meeting, putting his own existence at risk.
- Marty ensures his parents meet and fall in love, thus securing his own existence.
- He returns to 1985 with the help of the 1955 version of Doc Brown.

### Back to the Future Part II (1989)

- **2015:** Marty, Doc, and Jennifer (Marty's girlfriend) travel to 2015 to prevent Marty's future son from committing a crime.
- They succeed, but Biff Tannen (the antagonist) steals the time machine and travels back to 1955 to give his younger self a sports almanac that would make him rich.
- **1985:** Marty and Doc return to 1985, only to find an alternate timeline where Biff is rich and powerful.
- They discover that the timeline was altered by Biff in 1955 and decide to fix it.

### Back to the Future Part III (1990)

- **1955:** Marty and Doc find the time machine and travel back to 1885 to prevent Doc from being killed in the Old West.
- **1885:** Marty saves Doc, and they meet Clara Clayton, a school teacher, with whom Doc falls in love.
- Marty and Doc repair the time machine, but decide to stay in 1885 a little longer.
- Doc and Clara decide to stay in 1885, while Marty returns to 1985.
- **1985:** Marty finds out that Doc and Clara eventually traveled through time and are happy together, and he decides to focus on his present life with Jennifer.

I hope this helps you better understand the timeline of the Back to the Future series!
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