John Ritter has a sitcom coming up on ABC starting Sept 17, which will mean a lot of promotion. Yesterday he was on Wayne Brady. On Sept 16 he will be on The View! Of course, more talk shows will be scheduled later.
He also will be on the season premiere of the New "H2" Hollywood Squares the week of Sept 16, check local listings for time and channel.
If that's not enough, the season premiere of John's Clifford the Big Red Dog is Sept 18 on PBS.