He may not be as universal as baseball, but Sylvester Stallone's "Rocky," below, is undeniably a national symbol of some kind. And if you are not into game four of the World Series (at 8 tonight, Channel 11), WNUV-Channel 54 is offering a chance to get to know Rocky Balboa a little better. An hourlong documentary, "Rocky, An American Hero," airs at 8, with Richard Crenna hosting a look at the "Rocky" film series. The show includes the gimmick of Stallone talking split-screen to his fighter alter-ego, and there is some predictable plugging for the upcoming "Rocky V," too. Following at 9 comes the screening of the original 1976 movie. ''Fantasia'' is 50 years old this year but the animated Disney film shows absolutely no signs of wear. The film may, in fact, have even improved with age. Leopold Stokowski leads the orchestra as it conducts classics to which animation has been added. See it and take the children with you. Rating: G. ****
An effective version of William Hanley's searing drama, "Slow Dance on the Killing Ground," is being staged by students of the Towson State University Theatre Department under the direction of guest director Robert DeFrank. Set in 1962 Brooklyn, N.Y., a hostile young black man and a pregnant young woman seek shelter in a candy shop run by a Holocaust survivor. Fine performance by Mark Gallop, above. Mainstage Theatre, Towson. Tickets $7. 830-2787.