. >> reporter: the reverend robert h. schuller was best known for the "hour of power," that influenced the generation of megachurch pastors. presidents came to worship, but it didn't start that way. when he was 4, guidance from his uncle. >> he put his hand on my head and said, robert, you're going to be a preacher when you grow up. and i said, oh, really? and i added it to my little prayer at night. >> reporter: in the 1950s he preached at a drive-in from the roof of a snack bar. >> this is the day that god has made. >> reporter: in the '80s his congregation grew. the $20 million crystal cathedral was the beacon of his popularity, but by the new century his ministry unraveled. the church filed for bankruptcy. >> life's not fair. >> reporter: diagnosed with cancer two years ago, tonight reverend schuller is remembered for his message. >> if you can dream it, you can do it. >> reporter: miguel almaguer, nbc news, los angeles. >>> when we come back after the break, we were one of the last to visit the iconic set of "mad men." what w