When Bumblebee is outpaced by a mysterious blue speeder, he has to get a rematch to prove that he's the fastest thing on Earth. But meeting up with the mystery car again means joining an underground street racing league -- and Sari won't let him go without her! Who's behind the wheel of this mystery car? Can Bulkhead convince Bumblebee to set a better example for Sari? And are we actually going to find out what the deal is with the mystery car, ooorrrrr...? Join us this week for Velocity!