Please refresh my memory.
It's a rather odd episode, because aside from a very brief bit near the end, Mulder only appears in flashbacks. Basically the episode is mostly flashbacks with Scully being interviewed by an author (Jose Chung) about a recent case they investigated involving two teens who were potentially abducted by aliens who in turn encountered a third alien. But it appears the "aliens" were in fact just disguised members of a top secret Air Force project. What actually happened and if the third alien even existed is never revealed, just lots of contradictory flashbacks from Scully and other people the author interviewed. Kind of a Rashamon. Also known for its cameos by Jesse Ventura and Alex Trebek.