of raising children and paying a mortgage. ♪ ♪ sometimes you want to go where everybody knows your name ♪ >> i don't know if i can tell you why "cheers" was so popular in the '80s but i know the song was brilliant. >> as it was coming to the end of the run, glen and liz charles were trying to think of what their next project would be. >> we were a desperate network. i thought my future at nbc was on the line and it was a re remarkbly simple pitch. we want our characters to come into a bar, share their life stories. >> me, i like the challenges. dogs, vicious kids, hard to find mailboxes. >> you think the accounting is boring, hey? i miss one digit, the whole company goes into the toilet.