So the 7th Doctor ended his run in 1989

The 8th Doctor started in 1996

Back to the Future 3 came out in 1990.

Emmett Brown’s nickname was “Doc”

He visited Marty in his version of the Tardis (or train).

So I’m calling it. Between the 8th and the 9th, we had the War Doctor.

Between the 7th and the 8th, we had the Mad Scientist doctor.

He travelled around with his companion, Clara, and did science-y stuff.