After eight grueling weeks of opening round competition, the semi-finals begin with a bang at Gladiator Arena, as four of the strongest and fastest contenders return to battle the Gladiators one more time for a shot at the finals. If the contenders didn't have enough to worry about, tonight we unleash the biggest, baddest Gladiator yet. Are you ready to meet The Beast? "American Gladiators" is hosted by Hulk Hogan ("Hogan Knows Best") and Laila Ali ("Dancing with the Stars?).