bit. it was 1966 and steve o'donnell was a writer for dave's show. >> if we would get a letter that seemed provocative enough, we would seek them out. >> i think this is the house. >> just one scexample of how da changed the game. >> let's see if colleen is home. let me just ring the bell here. doesn't appear that anyone's home. >> four years into its run on nbc, "late night" was both clever and unconventional. >> can you show us around the place and maybe show us some of your sister's stuff. >> in the closet? >> yeah. >> the brother showed up, and he showed us the girl's room. >> let's take a look at her footwear. >> a lot of high-heeled shoes. >> then took us to where she worked at the mall. >> are you colleen boyle? >> oh, my god. >> and that was a kind of model for spontaneous kind of guerilla tv making. >> at the time, that was electric. >> conan o'brien could barely believe it. >> it just wasn't something you ever saw, the idea of johnny