To save Doc, Marty travels back in time to the Old West. But without any fuel for the DeLorean, how will they make it home?

As we wrap up our Back to the Future trilogy, we talk about the highest number imaginable, the one guy in ZZ Top who doesn’t have a beard, and what you definitely shouldn’t say as you walk into a store. We’re thinking fourth dimensionally as we find out if Back to the Future Part III stands the Test of Time.