On the fourth anniversary of his wife's death, Sisko meets an intriguing alien woman, Fenna, who captures his heart and then vanishes as quickly as she appeared. Meanwhile, Professor Seyetik, an expert in reviving dead planets, arrives on the station and much to Sisko's dismay, introduces his wife, Nidell — who looks exactly like Fenna. Strangely, she doesn't seem to recognize Sisko at all. After another fleeting encounter with Fenna, Sisko learns that Nidell is a Halanan, a psychoprojective telepath who is trapped in an unhappy marriage — and Fenna is a creation of her imagination.

Richard Kiley (Professor Gideon Seyetik)
Salli Elise Richardson (Fenna/Nidell)