1x11 - Sonic Underground

Robotnik organizes a track meet to lure Sonic into a trap. Robotnik is sure that Sonic will not sit out on a challenge of quickness. Sonia and Manic are also aware of Sonic's competitive nature and advise Sonic not to enter the event due to the risk that he may be caught. When Sonia and Manic cannot find Sonic, they head to the race to rescue him. Surprisingly, Sonic does not enter the race, but finds himself involved in a more challenging test of speed - the race to save his brother and sister.