Complex sentence: The winner of the main game competed in a bonus round against the Spoilers, a panel of three Ph.Ds who sat in separate isolation booths so that they could not see or hear each other.
Split into simpler sentences: The winner of the main game competed in a bonus round against the Spoilers, a panel of three Ph.Ds. Like the contestants in the main game, each Spoiler was in an isolation booth that was set up so they could not see or hear each other.