* CreatorBacklash: ''The Outer Limits Companion'' makes it clear that several contributors weren't universally pleased with how episodes turned out, most notably director Byron Haskin with "Behold, Eck!" and writers Meyer Dolinsky and Sonya Roberts with "ZZZZZ" and "Second Chance" respectively (the latter two had their scripts changed by rewrites they didn't do, with [[AlanSmithee Miss Roberts taking her name off the finished product in favour of a pseudonym]]).
* DuelingShows: With ''Series/TheTwilightZone'', though both were in production only during ''Twilight Zone's'' final season. In the end, ''Twilight Zone'' lasted for five years while ''The Outer Limits'' ended after two. On the other hand, the 1990s revival of ''The Outer Limits'' lasted nearly twice as long as both revivals of ''The Twilight Zone'' combined.
* FranchiseKiller: The original series was abruptly cancelled mid-way through the second season due to poor ratings, although it would gain another life in syndicated reruns, and get a long running revival series decades later.
* HeyItsThatGuy: Like most other [[GenreAnthology genre anthologies]], both this series [[TheOuterLimits1995 and its revival]] feature a host of recognizable actors, often before they became famous.
** among many others: Eddie Albert, Creator/EdwardAsner, Robert Culp, Creator/BruceDern, Creator/JamesDoohan, Robert Duvall, Carroll O'Connor, Creator/DonaldPleasance, Creator/WilliamShatner, Creator/MartinSheen, Grace Lee Whitney, etc.
** Creator/AdamWest and Ted Knight both appear in the TOS episode "The Invisible Enemy". Sadly, they have no scenes together.
* PropRecycling: Happens often in the original series. Even some of the alien costumes were reused, both in ''The Outer Limits'' itself and other shows (such as ''Series/StarTrekTheOriginalSeries'').
* SimilarlyNamedWorks: Although some of the {{revival}} episodes (like "A Feasibility Study" and "The Inheritors") are remakes of TOS episodes, "The Human Factor" is ''not'' one of them. it has the same title as a TOS episode, but a completely unrelated story.
* VindicatedByCable: The first season was fairly popular in its day, but season 2's hit or miss quality (along with a fatal timeslot change) caused it to take a nosedive and be cancelled. Fortunately, the show managed to gain a decades-long life and recognition in syndicated reruns.
* WhatCouldHaveBeen:
** The 1998 version of ''Series/TheOuterLimits Companion'' includes an appendix which provides detailed plot synopses of TOS scripts and premises that were never filmed. It also has details on rewritten and {{Deleted Scene}}s from the finished episodes.
** "The Forms Of Things Unknown" was written by Joseph Stefano with one eye on making it his directorial debut, but it ended up being helmed by Gerd Oswald (Stefano's only directorial effort came after he left the series, with the unsold pilot ''The Ghost Of Sierra De Cobre'').
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