Back to the Future Time Train (2017) #2 (Cover A Levens)

Doc Brown has fulfilled his promise to Clara by completing his most ambitious project: the Time Train! Now, he has taken the whole family on a vacation to 1939 to the New York World's Fair. Unbeknownst to them, however, there are some other visitors to the fair who have more nefarious plans-plans that will directly impact the Browns.