A good Hood "Robin Hood, Prince of Thieves" is two films in one, and both are enjoyable. One part of the movie is action with a -- of comedy; the other is almost camp. Kevin Costner is the bandit of Sherwood Forest, and Alan Rickman is the Sheriff of Nottingham. Rickman is very funny as the sheriff, but his part of the film is out of sync with the rest. Not that it matters. Both parts make an exciting whole. Mary Elizabeth Mastrantonio is Maid Marian. (If you want to compare this "Robin Hood" with the 1938 version done by Errol Flynn, it begins today at the Senator.) Language, sex, nudity. Rating: PG-13. *** Mark Barry's paintings suggest vivid stories unfolding with generous doses of suspense and humor. A show of his recent work at Knight Gomez Gallery, 836 Leadenhall St., examines such subjects as a father swinging his child, a saxophone player lost in his music, a dancing couple caught at a moment which seems to circumscribe their world. Bronze and wooden sculptures of women and animals by Raya Bodnarchuk seem wise and self-possessed, as still as Mr. Barry's subjects seem dynamic. Through June 29. Hours: 10 a.m. to 5 p.m. Tuesdays to Saturdays. Call 752-2080.
The area premiere of Brian Clark's "The Petition," a sophisticated, humorous look at a 40-year marriage is on stage at the Olney Theatre. This absorbing production, directed by John Going, features veteran actors Mark Hammer and Ruby Holbrook. Conservative British army general Sir Edmund Milne clashes with his wife, Lady Elizabeth Milne, when she declares she has signed a petition calling for a ban on the first use of nuclear weapons. As they argue their points of view, the delicate fabric of their union begins to unravel. 8 p.m. Route 108, Olney. Tickets: $21. Call 924-3400. Don't make the mistake of assuming that "Kindergarten Cop" is for small children. It isn't, but it will please the older kids and fans of action films. Arnold Schwarzenegger does some honest acting as an undercover cop who poses as a kindergarten teacher to persuade a murder witness to testify against a murderer. Penelope Ann Miller is the woman on the run, and Richard Tyson is the killer, the father of her son. Violence, language. PG-13. ***
From tee to green
In the early days of golf coverage, television fans were lucky to see key shots of just the last few holes. But now viewers watch any shot from tee to green on every hole of an 18-hole tournament, including this weekend's ABC coverage of the U.S. Open from Hazeltine National Golf Club in Chaska, Minn. (1:30 p.m. today and tomorrow, Channel 13.) The Open is perhaps second only to the Masters in prestige, and this year offers defending champion Hale Irwin a chance to become one of just five men to win it four times.