I had an interview for the Chase a couple of years ago (after being successful on Pointless). About 20 of us in the room and (not blowing my own trumpet) I was by far the most 'intelligent'...so when they said 3 people made it to the next stage everyone said "you'll be one"; but I wasn't. They don't want intelligent people; they want people with back stories. Eg one guy was writing a childrens book "so he could read a bedtime story to his kids"! So if you ever apply, make sure you have a good 'story' about yourself you can use.