Star Trek: The Next Generation, Series 4, Episode 13. First broadcast on Monday 4 February 1991. Stardate: 44474.5.

Many years ago, Joe and Nathan were offered a contract by a shadowy devilish figure, who promised them 180 episodes of peace and prosperity until her return, when she would demand their eternal servitude, mostly consisting of admiring her smile and the fabulosity of her hair. Honestly, they can both see the upside.