Just saw an amazing X-Files episode that's a missing link in this chain of related sci-fi movies/shows. Highly recommend if you are into dreams and subversion-of-reality/perception concepts.

1. The Twilight Zone S3 E27 “Person or Persons Unknown” (1962)

2. Total Recall (1990)

3. The X-Files S6 E21 “Field Trip” (1999)

4. Inception (2010)