Johnny Carson will celebrate his 25th anniversary...

Johnny Carson will celebrate his 25th anniversary as host of “The Tonight Show” with a 90-minute special in prime time. NBC has set the show for Oct. 1--exactly 25 years from Carson’s first stint on the late-night program. His guests that first night: Mel Brooks, Tony Bennett, Joan Crawford and Rudy Vallee. Like previous anniversary shows, this one will feature Carson, Ed McMahon and Doc Severinsen showing highlights of past programs.

Jim Hill, who recently jumped from KCBS-TV Channel 2 to KABC-TV Channel 7, will make his first appearance on ABC’s “College Football Today” Sept. 12. He’ll work the show with Al Trautwig. The network assignments beyond his regular sportscasting duties on the local station were part of the lure to switch for Hill.

Tony Danza of “Who’s the Boss?” is starring in “Wall of Tyranny,” a TV movie for NBC about the building of the Berlin Wall. Danza plays an American soldier who tries to help East Germans escape to the West. Also starring are Sid Caesar, David McCallum, David Robb and Colette Stevenson.

“Rap Master Ronnie,” the Off-Broadway play by “Doonesbury” cartoonist Garry Trudeau and Elizabeth Swados, is coming to cable. It’ll be seen at an as-yet unspecified date on the Cinemax pay-TV channel as part of the “Cinemax Comedy Experiment” series. . . . In another installment, Eugene Levy will reprise his role as schlock comedian Bobby Bitman from the old “SCTV” series.

Dee Wallace Stone has a starring role in “The Christmas Visitor,” a new movie for the Disney Channel that was filmed in Australia. John Waters plays her husband and Andrew Ferguson and Nadine Ganner portray their children. The movie, to be shown in December, was directed by George Miller, whose earlier films include “The Man From Snowy River.”