The man behind Sesame Street’s Count von Count, Jerry Nelson, died Aug. 23 at age 78. Nelson, who worked with Muppets creator Jim Henson early in his career, also played Gobo Fraggle on Fraggle Rock, a Henson TV series from the 1980s. Nelson “imbued all his characters with the same gentle, sweet whimsy and kindness that were a part of his own personality,” said Lisa Henson, c.e.o. of Jim Henson Co., in a statement. “He joined the Jim Henson Co.