. >> i'd like to introduce to you t.j. walsh, when we first brought t.j. to you, he was homeless, heroin addicted and begging for money it feed his addiction. >> we're on a journey today to save one life if we can, not going to be easy but assembled the team. the first with us is great friend of the show, jay lasater.. >> i hope today is the day for t.j., i hope we can get in there and make magic and convince him this is the right thing to do, but, like, he's -- we're never rational. if he's got a lot of heroin on him, he's probably not going to come. >> right. we're going to meet christie walsh, going to meet her mother who hasn't spoken to her son in a few years.. >> today, family in here, they lost their son, brother, nephew, just down the street under the ben franklin bridge. homeless, college graduate, great kid. >> i can relate. we're going to go save him. >> when did you guys first see a change in your brother? >> a change? a long time ago. i would say right after he graduated college, actually. a little more distant and isolated. from there, up unt