"The Terrible Tunnel" is the eighth episode of Fraggle Rock in its first season. It originally aired on February 28, 1983
Plot[]
After hearing the Storyteller's tale of Sir Blunderbrain and the Terrible Tunnel, during a game of Hidey-Ho, Wembley finds himself wandering around the Terrible Tunnel. Of course, most of his friends don't believe him. So, to prove it, he aids Gobo and Red to go find it.
Meanwhile, Doc tries to make a collapsible bookcase when Sprocket brings a horseshoe. Doc thought it would be perfect for his bookcase.