A RESTAURANT SHIFT TURNED INTO A STRIP SEARCH, BUT WILL THE MAN ACCUSED OF ORCHESTRATING THE HOAX VIA TELEPHONE GO TO JAIL?

John Qui�ones Reports on �20/20,� Friday, December 1, 10:00-11:00 p.m., ET on ABC

Plus: JuJu Chang Reports on �Mike�s Math� and How It Is Changing Kids� Lives

How far will people go to follow orders? A man posing as a police officer convinces fast food workers across the country to do unthinkable acts to co-workers � all via telephone. How could a man be so convincing that strangers would act out his cruel requests? John Qui�ones updates his report from last year on this bizarre crime � including what happened to the Louisville, Kentucky area McDonald�s assistant manager and her fianc� who performed the caller�s demands, as well as the man from Florida who was on trial for allegedly being behind the hoax. �20/20� is inside the courtroom as his verdict is read, airing FRIDAY, DECEMBER 1 (10:00-11:00 p.m., ET), on the ABC Television Network.

Can you multiply four-digit numbers without a pen, paper or a calculator? As JuJu Chang reports, you don�t have to be a math wiz to solve math problems, not when Mike Byster is teaching you how to make math fun in an unconventional way. Byster is a human calculator who left a career as a trader on the Chicago Mercantile Exchange to teach kids that math doesn�t have to be scary. He created a system for solving complex math problems based on his uncanny ability to memorize. �20/20� puts �Mike�s Math� to the test with a group of students from Randolph Middle School in New Jersey. How well will the students do, and how well will JuJu Chang do when she too takes the �Mike�s Math� challenge?

�20/20� is anchored by Elizabeth Vargas and John Stossel. David Sloan is the executive producer.