Tonight will be the 232nd official OtC webcast.
Sixteen casts had no theme. Most of these were early in the history of the program.
Nine themes were done for two consecutive casts. One theme (Psychedelia) was done 3 weeks in a row once and 2 weeks in a row another time. (I admit, I love that Psychedelia!)
Some themes have been done multiple times, non-consecutively. One theme (Jazz) has been done 6 times in this manner. "Summer" has been done 4 times. Three themes have been done 3 separate times (Psychedelia, Autumn, and Saxophonics). Several themes have been done twice.
So if you subtract all the casts where there was no theme or where a theme was repeated in some way, I come up with 178 different themes in Off the Chart's history, from inception through May 4, 2015.
I still have a lot of new, never-been-done themes in the works. I hope you all continue to enjoy the themes and the cast.
Update May 9, 2015: My counts were off by a little when I first posted this. I've updated the numbers.