D.W. Blows the Whistle is the second part of the sixteenth episode of Arthur season 2. D.W. Blows the Whistle aired on March 16, 1998. It aired with the episode "Love Notes for Muffy".
D.W.'s overzealous safety patrolling and whistle blowing is pestering everyone. Arthur and his friends try to stop her from attending the upcoming soapbox race. Arthur must bring her to the race and D.W. climbs a tree and they call 911 to help her come down.