Mamie Van Doren is a Las Vegas madame in the HBO miniseries "The Glory Years" now shooting in the sinful resort city of . . . Los Angeles. Plus Donna Pescow, Joey Bishop and Engelbert Humperdinck. . . . John Cleese drops in on everyone's favorite bar in an upcoming "Cheers." . . . Charo gets a visit from TV repairman Dan Hedaya that gets him in trouble with his wife in the replacement series that debuts next month, "The Tortellis." . . . Patrick Duffy and Ray Charles join the Beach Boys for an ABC special entitled "25 Years Together," which tapes next week in Hawaii. . . . In a future "Designing Women," Gregg Henry is Delta Burke's ex-husband and a pitcher with the Atlanta Braves who tells all in a book about their relationship. . . . Pop and jazz stars Eric Clapton and David Sanborn have been signed to join Michael Kamen to handle the music chores for the Mel Gibson detective movie "Lethal Weapon." . . . Robert Klein is filming an hour comic video entitled "Tax Attack '87," based on the laugh-filled new tax reform laws. . . . Scott Valentine, who plays Justine Bateman's boyfriend on "Family Ties," is cast in a spin-off series in development.