"Greg Walker was a writer for Smallville. Some episodes he has written are:"@en . . . "Writer"@en . "Greg Walker is a writer for CSI: Crime Scene Investigation."@en . "CSI: Las Vegas"@en . . "Greg Walker was a writer for Smallville. Some episodes he has written are:"@en . . . . . "Greg Walker is a writer who worked on The X-Files."@en . . . "Greg Walker is a writer who worked on The X-Files."@en . . . . . "Greg Walker"@en . "Greg Walker is a writer for CSI: Crime Scene Investigation."@en . . . . . "Greg Walker"@en .