Every season of Testers ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of Testers!

Why do mosquitoes prefer to bite some people over others? What happens to the body when it faces extreme cold? What is best to lower body temperature, cold or hot beverages? Why does it hurt so much to get pricked with a needle? Rafael Cortez will be our guide in this scientific quest to answer these questions, with five guinea pig testers who will participate in fun experiments.

The Best Seasons of Testers

Every season of Testers ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of Testers!