This apparently started last week, and goes through July, with more tonight. TCM is airing various interviews from the Carson Tonight Show. According to my local TV blogger, to DVR it easily, you need to set the first one to record and extend by an hour. Each one is considered a separate show. I just looked at my guide, and each one is indeed listed separately. So either record ones you want individually, or record the first with the extension to get them all in one recording.