corner. 17th avenue, international. >> seasoned vice cops know that there's no surefire way to predict when the johns will show up. but today it only takes ten minutes for the undercovers to get their first bite. >> how are you doing? >> all right. we got a possible with the gray prius. felicia's making contact right now. >> hey, baby, how you doing? we can go wherever you want to go. do whatever you want to do. >> the small talk quickly turns from dinner to the man's appetite for sex, and a deal is struck. >> all right. there's going to be a swoop. i'll let you know when it's off. >> go back there. go in the alley. >> with a quick tug on her harks the undercover signals there's enough to make a case, and arrest teams swoop down on the unsuspecting john. >> they got it. >> what was my time for that? >> let's go with 15:40. >> the undercover jots down the details of the day's first catch, knowing full well there will be many, many more. >> hey, look northbound on the west curb. old boy in the driveway waiting