"Leonard Betts" is the twelfth episode of the fourth season of the American science fiction television series The X-Files. It premiered on the Fox network on January 26, 1997. It was written by Vince Gilligan, John Shiban, and Frank Spotnitz, directed by Kim Manners, and featured a guest appearance by Paul McCrane as Leonard Betts/Albert Tanner. The episode is a "Monster-of-the-Week" story, unconnected to the series' wider mythology. "Leonard Betts" was Fox's lead-out program following Super Bowl XXXI and was the most watched episode of the series, receiving a Nielsen household rating of 17.2, being watched by 29.1 million people in its initial broadcast. The episode received positive reviews, with critics commenting positively on the character of Betts and McCrane's performance.