You know it's an Aaron Spelling police drama when you have to wait about three minutes to see new recruit Vince Romano (Dance Fever's Adrian Zmed) in his underwear and no one suggests that his seasoned partner, Sgt. T.J. Hooker (William Shatner), stop romancing their witnesses. But don't let an orangutan playing a key role in cracking a case fool you: These first 27 episodes pack a serious punch. At their best, they comment on real issues: citizens' apathy and fear of aiding police; the compromised safety of procedure-burdened field officers; the limits of loyalty among men and women in uniform. Less compelling are story lines that involve yet another robbery plot; misplaced cameos by Jerry Lee Lewis and the Beach Boys (Leonard Nimoy does it right, however, as a vigilante cop whose daughter has been raped); or trainee Locklear trying to dance. Fortunately, the lure of Shatner chewing on lines like ''Think, man. Give me something to work with!'' is always too strong to resist. EXTRAS Releasing this six-disc set without commentary from the mugging partners may be criminal, but including a collection of original ''Next on T.J. Hooker. . .'' promos as the sole special feature constitutes cruel and unusual punishment.