Star Trek: Deep Space Nine S06 E17 Wrongs Darker Than Death or Night

"At the edge of the Final Frontier, the Universe's greatest mystery is about to unfold."

Stardate: Unknown. After receiving some disturbing information from Gul Dukat, Major Kira seeks Sisko's approval as Emissary to travel back in time to find out the truth about her mother. Meanwhile, Chief O'Brien and Dr. Bashir discuss a holosuite program surrounding the Battle of the Alamo.