Hey, cha-cha. Dennis Miller will host GSN's Grand Slam, a game show pitting top quizzer contestants (e.g. Jeopardy!'s Ken Jennings and Millionaire's Kevin Olmstead) against each other in tests of general knowledge, math, wordplay and more. Amanda Byram ( Paradise Hotel) cohosts, and the debut is Aug. 7.... The 31-year-old Museum of Television & Radio has changed its name to the Paley Center for Media, to better reflect today's media landscape. The center was previously known as Cave of Drawings Grunt and Fire!.... Do you think Harry Potter will be killed off in Deathly Hallows? Vote here (bottom right).