Marty: Wait a minute, Wait a minute, Doc, are you telling me that your made a time machine out of a DeLorean?
Marty: But won't that mean you'll damage the space-time by damaging both space and time?
Doc: Either way, when this baby hits 88, you're going to see some serious... well, just keep watching.
2/20/2015, 5:35pm: Hints are available. Look below the picture.
Upon Solving the Meta...
Time Travelers Captured: Bill & Ted
Doc: Well Marty, it looks like we've taken care of some of the time travelers.
Marty: They were easy Doc. I'm sure the other ones will be little harder.
Doc: But that's for the future!
Marty: You mean the past...
Doc: You know what I meant. Anyway, we got their AIR GUITARS, so now we are closer to fixing history!