ON AND OFF THE AIR:
* Actress Jada Pinkett, the Baltimore School for the Arts graduate who joined the cast of NBC's "A Different World" this season (as freshman engineering student Lena), comes home to co-host tomorrow's Sixth Annual Black Engineer of the Year Awards banquet at the Convention Center.
In addition, Ms. Pinkett will be taping segments of "Success Through Education," a locally produced, motivational television special centered upon the three-day engineering conference here.
"Success Through Education" will air in late March on WJZ-Channel 13 and some 65 other stations across the nation, according to Robert C. Stephens of the production firm Career Communications Group Inc.
Also slated to be part of the program are national rap artists Heavy D and MC Lyte, who are scheduled for a taping on location at Baltimore City College Monday, interacting with city public school students from a number of schools.
* Speaking of engineers, actor James Doohan told an interesting story at this week's preview of "Star Trek: The Exhibition," at the National Air and Space Museum in Washington. Mr. Doohan, of course, is Chief Engineer Montgomery Scott in the original "Star Trek" crew.
"People come up to me all the time and say, 'Thank you. You're the reason I decided to become an engineer,' " said Mr. Doohan, laughing. "Of course, I think they know I've never really done any engineering, I just play the part."
* The two United Artists Cable systems in the Baltimore area, in Baltimore City and Anne Arundel County, are screening an unusual free preview of premium services over the next two weekends.
Today through Sunday night, selected programming from The Disney Channel and Showtime can be seen by all subscribers on special channels, and programs from the HBO and Encore premium services will be available next weekend.
On the city's UA system, check out Channel 41; in Anne Arundel County, tune Channel 20.
* One can ask how the theatrical excess of professional wrestling can be worth $24.95 to anybody, but tonight marks the telecast of "SuperBrawl II" on pay-per-view services of participating systems.
Lex Luger and Sting -- the wrestler, not the rock star -- settle a grudge match for the World Heavyweight title, live from Milwaukee's Mecca arena. Check your cable carrier for details.
* Maryland Public Television jumps into the recycling cycle this weekend with a locally produced half-hour special exploring the whys and how-tos of household participation in growing recycling programs.
Evening Sun columnist Dan Rodricks is the host of "Recycle for America," airing at 7:30 p.m. Sunday on MPT stations.