If you actually want to find serious candidates, it might be helpful if you told a liiiiiiiiiittle bit more about that television show, and that game with the ‘exiting’ (I think you mean ‘exciting’) question-answer form.
What is the theme of the game? Knowledge? Fun? Improvising? Is it just going to be questions and answers, or do the contestants have to participate in active ‘gaming’ as well? What level of intelligence do the questions require to be answered?
And what kind of people are you looking for? Old? Young? In for a bit of a laugh? Dead serious? Prepared to be taken the micky out of, of to bathe in a pool of chocolate custard? Into a certain subject, lika television, music, films, history, stupidity?
I hope you will find what you are looking for, although with this limited amount of information I doubt if anyone will be seriously interested. But you never know, it might just work.
I will just wait for the first broadcast, if you don't mind…