Jessica and John Jessica and John

Are you not entertained?!

In one Detour on Sunday's Amazing Race All-Stars (8/7c,), racers have to play gladiator at Rome's legendary Colosseum and face off in a sword fight to the (fake) death. It's not just about picking up the swords and sandals, but mastering the melodramatic acting-with-a-capital-A.

Quiz: Play the celebrity name game!

Check out our exclusive sneak peek below to see John

 and Jessica do battle. The Amazing Race All-Stars airs Sundays at 8/7c on CBS.
(Full disclosure: is owned by CBS.)