Star Trek: Deep Space Nine 55: Defiant (1994)

Synopsis
Jonathan Frakes recreates his Next Generation role as Commander William Riker...or does he? Paying a visit to DS9, Riker is greeted by Kira, who gives him a guided tour of the Defiant. Suddenly, Riker reveals himself to be his renegade duplicate Thomas Riker, whereupon he steals the Defiant on behalf of the Maquis, an act which threatens to start another war between the Federation and the Cardassians. Originally telecast November 26, 1994, "Defiant" was written by Ronald D. Moore. ~ Hal Erickson, All Movie Guide