When Major Kira has the chance to go back in time to kill Gul Dukat’s girlfriend, she jumps at the chance. But when she gets too close to the target, she must decide if her second thoughts will give her greatest enemy some second chances. Is Worf more of a Raphael, or a Leonardo? Is it still time travel if Riker doesn’t say so? Where we’re going, won’t we need rules? It’s the episode that has more mommy issues than daddy issues.