We’ve covered the Prop. 8 trial pretty extensively here on the Instinct blog, but have you ever wondered how the two lead counselors for our side, Ted Olson and David Boies—one-time opposing lawyers—ended up on the same side fighting for gay rights?

In two parts airing tonight on CNN’s Campbell Brown (8 p.m., ET), CNN senior political analyst Gloria Borger examines how after nearly a decade, these two political “opposites” became friends, and how a group of Hollywood activists brought them together to challenge Proposition 8.

Click here for a sneak peek, but be sure to catch the full story tonight on CNN.