Michael J. Fox uses his Parkinson's for role on "The Good Wife" tonight

From Entertainment Tonight:

Michael J. Fox turns the symptoms from his Parkinson's Disease into an acting advantage on Tuesday night's episode of "The Good Wife."

Alicia (Julianna Margulies), Diane (Christine Baranski) and Will (Josh Charles) have to regroup when they're caught off guard by a brilliant disabled attorney, Louis Canning (Fox), who uses his neurological condition to sway a jury during a test case for a huge class-action suit against a pharmaceutical company.

"He is a crafty guy who has … no guilt or shame about using [his condition] to his benefit in the courtroom," Michael says. "It makes it a lot of fun. For me, a lot of times I am trying to play down certain physical experiences I am having, where he lets it rip."

In fact, Louis is so good at his job that he quickly turns the tables and makes the daughter of the victim the bad guy and makes the drug company the good guy.

"So it looks like we're Goliath and he's David when we thought it would be the other way around," Julianna explains the story. "He manipulates every single jury member with his disabilities -- and plays them up."

Michael goes on to say that people who have a chronic condition deal with the realities of that on a daily basis, as well as dealing with people's perceptions of it, which can be different than what the actual reality is.

"If you chose to use that to gain a position, if you take that and use it as a weapon or as an affectation then you can change people's perception," he says.

This may not be the last we see of Louis. Julianna says, "I've always been a fan and admirer [of Michael] and never got the chance to work with him, and I don't want to sound corny, but it's really been kind of life-changing. He's the most down-to-earth person I've ever met, despite what he's going through. You would never know working with him. I was hoping he'd become a series regular. We're probably going to ask him and he'll probably say no, because our hours are horrific. I think he'll come back because I think he's had a really good time and his character and my character spark well together."

"The Good Wife" airs Tuesday nights at 10 p.m. on CBS.