Episode #0683

[It's up to the first poster to come up with a set up, and then each following post will either complete it or fill in the blank(s). And, as always, whoever posts the set up is certainly allowed to post their own completion/fill in as a follow up.]

Set-up:
Barn: "Now, the main thing is not to panic, and to remember that there is no problem which cannot be solved or made much worse by travelling into the past, and screwing up all of history!"
Julia: "You tell 'em, __________!!"