12: Battle for the Burning Nebula
Synopsis: The joint Federation-Betazed fleet moves in to engage the Klingon stations in the Burning Nebula. To their surprise, the conflict is shortened by the appearance of the Tholian Assembly, who have claimed the center of the Nebula as a territorial annex. The Tholains yank the Klingon ships, along with the USS Petrov, into the interphase. Only the Carter has a chance to get the Petrov back by following them through an interphase rift and negotiating with the enigmatic silicon life forms.