Back to the Past

The Enterprise is attacked by Earth's defenses by the order of President Sisko. Picard talks to O'Brien about Sisko and decides to return to the past to prevent Sisko's take over. The crew accidently arrives to the 12'th century. After another try they arrive to the 20'th century, where Data assassinates Sisko before he takes over. The timeline is restored, but with a terrible price for Picard, the reappearance of Lwaxana Troi.