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| PERFORMER | Mike Petersen |
| DEBUT | 1987 |
Hammerhead Doozer is a Doozer who appears in the Fraggle Rock episode "The Voice Inside." A friend of Cotterpin Doozer and Wrench, Hamerhead takes an active interest in Cotterpin's stories of her adventures with the Fraggles. He has difficulty understanding them, however, and seems easily satisfied with a few words in place of a full narrative.