Man of Action's Steven T. Seagle steps in as things take a turn for the creepy! In a rainy Northwest stop on their endless summer vacation, the Tennyson family is drawn to a circus where the crowds aren't cheering, the clowns aren't laughing, and the ringmaster has plans for a frightful future well beyond his broken big top. Can Ben master the Omnitrix in time to find the right alien to stop the bizarre ZOMBOZO from making Grandpa Max his next death-defying act? A new, twisted two-part adventure begins here – including the debut appearances of XLR8 and Stinkfly!