[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.]
Fill in the blank: Catherine - "Morgan, no!!" Morgan - "Yes, my dear Catherine! You and Bramwell are going to ________ right now or I'm going to shoot you both to death!!"