This has aired before, but it is very interesting:


Thursday Aug 9 8:00 PM A&E
Friday Aug 10 12:00 AM A&E
"Biography"
'Don Knotts'
60 min.
A profile of comic actor Don Knotts, whose roles have ranged from lovable sidekick Barney Fife in “The Andy Griffith Show” to swinging landlord Ralph Furley in “Three's Company.” Included are comments from John Ritter, Andy Griffith, Steve Allen and TV GUIDE critic Matt Roush.
Rating: TV-G
Category: Biography

Cool. I'll have to remember to watch this time.