I see what the others mean with the story headers. It's really just a story in two parts, as posted, so I'd suggest just labelling them:
1/2 2/2
LabRat
Athos: If you'd told us what you were doing, we might have been able to plan this properly. Aramis: Yes, sorry. Athos: No, no, by all means, let's keep things suicidal.
