Star Trek: Deep Space Nine (1993) - 7x20 - The Changing Face Of Evil (4)

Stardate: Unknown Worf and Ezri return safely to Deep Space Nine. The Breen launch an attack on Federation Headquarters, while Damar secretly forms plans to free Cardassia from Dominion rule. Sisko is informed that the Breen have launched an attack against the only foothold the Federation has in Dominion territory. Kai Winn and Gul Dukat try to find a way of releasing the Pah-wraiths from the Fire Caves on Bajor.