LEONARD NIMOY finishes explaining the doors in STAR TREK. HOMER and BART are enjoying conducting the MONORAIL, until there is an explosion in the engine, sending it out of control at dangerous speeds. HOMER discovers the BRAKES are out of order. SEBASTIAN COBB and MARGE determine the MONORAIL is traveling at 180 miles per hour. In the CONTROL TOWER, tensions mount between CHIEF WIGGUM and MAYOR QUIMBY. With Co-host Geoff Clarke and Guest Commentators Sam Stovold and Kevin Young.