Wie is de mol? Who is the mole?

This is a dutch series with Dutch celebrities .(It doesn't matter if you don't know the characters because I am dutch and I really enjoy the show and I don't even know half of the characters)
By executing the assignments, the candidates can earn money for the pot. There is a mole present in the group, a saboteur. Nine candidates, one mole ... but no one knows who this is. Only a smart viewer can discover where and how De Mol sabotages assignments. Every episode a test is made about the mole. The person who answers the least questions corrects has to go home.

One season is going on right now and every week another episode will be uploaded

My favorite season is season 13