The documentary, titled "Acting Class of 1977," is about high-profile actors who graduated from Australia's foremost acting school -- the National Institute of Dramatic Art. It aired on Australian TV in 2008.
In the documentary, Mel purportedly says, "I had really good highs but some very low lows. I found out recently I'm manic depressive."
We've learned Oksana's lawyers will try to paint Mel as too unstable to care for Lucia, and want to grill him about the comment.