Most PBS stations are debuting a new episode of American Masters this week — a portrait of Johnny Carson that is said to be more honest and unsanitized than most. I haven't seen it but of course will be watching.
In Los Angeles, it's on KOCE, Channel 50 on Monday, May 14 and then again on May 19 at Midnight. If in any town you're searching your DVR program guide and can't find it, try looking under "Johnny Carson: American Masters."