Thank you, exxcéntrica!! My initial reaction to the post was that serie or series profesional(es) was probably not the best answer. diegonel tried to tell us that it sounded bad in the first place, gentle confirmed it and now you. I'm convinced.
Serie is one of those words that is confusing in that ... oh wait. I am not even going to try this anymore
I'll just admit defeat!!! I was wrong about serie(s)!