dolly, what are you feeling right now? that somebody could have just taken my son. yeah, it s hard. i ve been there i have been in your shoes and i know, it s an eye-opening home and you see that door shut on your kid. you say my kid would never do that. he got into a stranger s car and closed the door. you don t know him. right? just one minute. what if he just took you? what if it was somebody else and just took you? reporter: ude says he knew this was dangerous and tried to snap a photo of the truck s license plate. you had good instincts. is there something could you have done to have been more per base is sive with your brother? i could have grabbed him and walked away. no, we got to go. do you feel like you learned something really important here today? yeah. are you glad you did this? yeah, really glad i did this. there you go.
[ dogs barking ] reporter: and then . my god, she opens the door. remember me, john? i have one quick measurement to do? reporter: danielle s mom can t believe her eyes as sh her daughter lets john in and then makes one critical mistake. sorry, my parents aren t home now. reporter: she lets the actor know she is home alone. oh, i m in shock. i m in complete shock she did that. reporter: a 12-year-old girl alone in the house with a man she barely knows. i m heartbroken at the possibilities that this means for her. reporter: we go inside to talk to danielle and tell her what s going on. your mom and i, we were watching you with hidden cameras, doing a show called my kid would never do that. i tell her john was an actor we hired to test her. guess what you did? i let him in. [ laughter ] i m so shocked.
reporter: we instructed our actor to be friendly, establish a rapport. he praises sam s artwork. this is terrific, man. thanks. reporter: then, a few days later, sam s mom tells him she is going out to run errands. love you. okay. love you, too. reporter: she leaves him alone in the house, but she really joins me in the watch mobile, parked right around the corner. you can tell i m nervous. reporter: nervous she hasn t made it clear to her son that just because he has melt someone before doesn t mean he should open the door when he is home alone.
door and drives off with eric in the truck. we just lost our son. oh. what were you feeling in that moment when that door closed? that was the killer moment, because as long as the door was open, it could go either way. once the door is closed, he is gone. reporter: his stunned parents go outside to meet eric. our actor only drove around the corner and dropped him off at the watchmobile. what s up, eric? you re actually here for a show called my kid would never do that. what were you thinking, what were you feeling when he was asking you for help? i was thinking i know him, i guess. i guess i could help him with a favor. did you really know him? not entirely. you know. reporter: eric says his parents always taught him to be polite to others. you know, we trained you growing up to be helpful, but there s this gray area in the middle where we got in trouble because it was like once you got
what are you thinking right now? wow. that s crazy. then it gets worse. closed the door on him. what are you feeling right now? i m pretty blown away. very surprised. reporter: there s jason playing games inside a dark trailer with a man he s never met. one minute goes by, then five minutes. then ten minutes. jason is s in there so long, it gets dark outside. this is scary. mm-hmm. very surprising. very surprising. come over here. we finally instruct our actor to bring jason to the watchmobile, where we tell him what s really going on. hi. i m natalie. hi. nice to meet you. nice to meet you, too. are you taking a look around and kind of wondering what s going on?