The latest version of this guide can be found at:
https://innermind.com/outerlimits/
In the U.S. the series first aired on cable and later in syndication. Showtime ran 6 seasons of the series then cancelled it after which Syfy (formerly the Sci-Fi Channel) picked up the series for a seventh season. The Outer Limits was planned from the start to run in syndication and alternate versions of some scenes were filmed to replace the ones shown on cable. The episodes produced for Syfy did not need changes. The series has also aired in other countries. Except for the double length episodes, the running time of the episodes has been 44 minutes 20 seconds.
The credits are generally listed in order they appear in the show. Things not actually listed in the credits are enclosed in brackets. Character names obtained from watching the show and other sources are enclosed in braces since the spelling might not be certain. The seasons in this guide refer to the filming seasons. Air dates are the first showing in the U.S. on Showtime or for season 7 on Syfy.
The viewer warnings Showtime might display before the episodes start are:
| AC | Adult Content |
| AL | Adult Language |
| BN | Brief Nudity |
| MV | Mild Violence |
| N | Nudity |
| RP | Rape |
| SC | Strong Sexual Content |
| V | Violence |