As a child, Riley LeBon was terrified of Count von Count on “Sesame Street.” Last week, the now-third-year University of Virginia student helped puppeteer the numbers-obsessed vampire with Muppet ...

In 1972, early into his tenure at Sesame Street, Norman Stiles thought up a pun. The former Merv Griffin comedy writer had spent his first year penning scripts around the kids program’s strict ...