Star Trek Fluxx Bridge Expansion - Rules of Play says:
Want to shuffle Star Trek Fluxx together with Star Trek: The Next Generation Fluxx? The games are already designed so that they can be combined, and the twelve cards in Star Trek Fluxx: Bridge Expansion allow them to mesh even better. The Bridge Keeper lets you take control of either Enterprise, and a host of new Goals let Kirk meet Picard, Spock meet Data, and the Past meet the Future!