I have always thought the least interesting programming you could air on the radio is baseball. The absence of any real, sustained action makes it pretty unbearable even on TV, but listeing to it on the radio is even more futile.
But I've changed my mind and baseball has been bumped to #2 on that list. The other night on my way home from work I was scanning the F.M. dial and came across a radio broadcast of, and this is just too stupid to make up, Wheel of Fortune.
I can't think of any game show that would be even the least bit appropriate for the radio format, let alone the one that REQUIRES you to see what is going on.