Template: RefDSN457
From Trekipedia
Berman, Rick & Piller, Michael & Behr, Ira Steven (Executive Producers). "Past Tense, Part One." Star Trek: Deep Space Nine, Season 3, Episode 11. Directed by Rea Badiyi. Story by Ira Steven Behr and Robert Hewitt Wolfe. Teleplay by Robert Hewitt Wolfe. Paramount Pictures Corporation, 2 January 1995.