Many thanks for this one, Derek; yet another remarkable fellow I was totally oblivious to, or at least never remembered...despite reading the credits in ENTIRETY of every single TV show and movie I've ever watched (and I WOULD read the credits of all the radio shows I consume too, but that's rather difficult to do).
I mean, the late Rapp was not only the son of the guy who created both Baby Snooks* AND The Bickersons, but also a onetime sitcom writer bigtime who chucked it all to end up as Regis's on-air gardening go-to expert?!?
Yet more evidence that That's Showbiz!
* I always thought that should be credited to Streisand, er, I mean the late Fanny Brice.