(S18E18) Oh, boy. Jack McCoy is up to his neck in trouble now. This Law and Order season finale -- number 18 -- was a maze-like story that started with a gold merchant being murdered, wound its way through high-class escort services, and landed at the desk of the governor of New York. Any resemblance between this story and the demise of real-life New York Governor Eliot Spitzer was completely on purpose.

In true Law and Order fashion, the part about the hookers and the Governor was ripped right from the headlines. Unlike reality, though, the fictional governor was even more slimey and reprehensible than Spitzer seemingly. I'll explain it all, and go into more details about how it comes to bear on the characters on L&O after the jump.

%Gallery-23409%

A show of hands here, please? Who thought that we would be talking about the 17th season premiere of NBC's Law & Order when the show first premiered back in September of 1990? Just as I thought . . . not that many hands. Yet, here we are, about to talk about the season premiere of the longest running crime series and the second longest-running drama series in the history of American broadcast television.

Granted, no one remains from the original L&O cast, but that really isn't what brings back viewers week after week. It's the uniqueness of the show that grabs them. It's a style that no other show has successfully duplicated. Even its siblings Law & Order: SVU and Law & Order: Criminal Intent have gone a different route in the way crimes are shown being investigated. That's why the original remains popular to this day.

So, with kudos out of the way, let's talk a bit about what you can look forward to in the season premiere. Be warned, slight SPOILERS ahead after the jump.

If there is any one show that can claim long-running success with a ever-changing cast of characters, it's NBC's Law & Order. For example, during its 16-year run (which will become 17 years starting next fall), the Assistant District Attorney's second-chair slot, which actor Richard Brooks left back in 1993, has been filled by five individuals: Jill Hennessy, Carey Lowell, Angie Harmon, Elisabeth Rohm (who departed earlier this last season) and Annie Parisse as current ADA Alexandra Borgia. Doctor Who didn't even regenerate this much in so little time!

Well, it looks like Parisee may be heading out the door this season, according to Zap2it. Of course, NBC is keeping mum about this rumored departure in order to maximize its ratings during May sweeps. The only mention of the final episode involves Borgia's boss, ADA Jack McCoy (Sam Waterson), who risks everything in order to nab two vicious criminals.

Parisee's Borgia replaced Rohm's Serena Southerlyn earlier this season when she was let go from the DA's office. In a bit of a departure from the L&O formula, which rarely steeps into a character's background, Southerlyn asked if she was let go because she was a lesbian. Who would replace Borgia? Well, if Conviction isn't renewed, there will be a whole mess of new ADA's to choose from. Maybe McCoy can team up with Alexandra Cabot (Stephanie March).