*A promo of President Barack Obama’s Dec. 8 visit to Discovery Channel’s “MythBusters” shows the commander-in-chief seeking further testing of a myth that was already busted in previous episodes.

As previously reported, Obama asks hosts Adam and Jamie to test the myth of Archimedes’ death ray, and whether the Greek scientist really set fire to an invading Roman fleet using only mirrors and the reflected rays of the sun.

The myth has been proven wrong twice in previous episodes, but Obama isn’t taking no for an answer, claiming the myth “hasn’t been thoroughly tested.”

The series, now in its eighth season, aims to uncover the truth behind popular myths and legends by conducting elaborate experiments.

“I am a big fan of ‘MythBusters.’ I am, and so are the girls,” the president tells hosts Adam Savage and Jamie Hyneman in the clip.

Watch preview below.