Elliot and Fin were preparing to help their kidnapped victim, Annika Bergion, to deliver her baby girl. Fin went to the truck to get the first aid kit, a flashlight, and newspapers.
Annika Bergion: Have you done this before?
Elliot: I got 4 kids of my own, I helped deliver each and every one of them
Annika Bergion: How many girls?
Elliot: 3. And 1 boy
Note: Elliot now has two boys and wasn't present for Eli's birth