"He also occasionally performed the voices of Herbert Birdsfoot, Sherlock Hemlock, and Tough Eddie, as well as many of the narrators; his regular voice sounded like an old fashioned radio announcer. During the late 1980s, Hero Muller took over both Herry and Cookie. Unlike the original English-speaking Cookie Monster, the Dutch \"Koekiemonster\" uses correct grammar."@en . . "He also occasionally performed the voices of Herbert Birdsfoot, Sherlock Hemlock, and Tough Eddie, as well as many of the narrators; his regular voice sounded like an old fashioned radio announcer. During the late 1980s, Hero Muller took over both Herry and Cookie. Unlike the original English-speaking Cookie Monster, the Dutch \"Koekiemonster\" uses correct grammar."@en . . . "Peter Piekos"@en .