Nick Madigan reports on how Johnny spent his retirement years.
Warren Francke examines Johnny's Nebraska roots.
Former Tonight Show writer Tom Finnigan remembers.
David Letterman will be back from vacation on Monday night and will do a show about Johnny. He has former Tonight Show producer Peter Lassally and former Tonight Show bandleader Doc Severinsen, plus clips from both Johnny's shows and Johnny's appearances on Letterman's old NBC program.