The Outer Limits (1963–1965)
7 user 1 critic

Keeper of the Purple Twilight 

A driven scientist is approached by a unearthly being who offers to exchange his alien intelligence in return for the experience of human emotions. Their experiment however has unforeseen ... See full summary »


(as Charles Haas)


(teleplay), (story)

Watch Now

From $1.99 (SD) on Amazon Video




Episode complete credited cast:
Prof. Eric Plummer
Janet Lane
Curt Conway ...
Franklin Karlin
David Hunt (as Edward C. Platt)


A driven scientist is approached by a unearthly being who offers to exchange his alien intelligence in return for the experience of human emotions. Their experiment however has unforeseen consequences for both of them and soon a team of alien enforcers has arrived to destroy both of them and the scientist's wife. Written by Gazhack

Plot Summary | Add Synopsis





Release Date:

5 December 1964 (USA)  »

Company Credits

Show detailed on  »

Technical Specs


Sound Mix:

Aspect Ratio:

1.33 : 1
See  »

Did You Know?


Control Voice: [Closing Narration] The curious mind cannot be chained. It is a free mind endlessly searching for the greater freedom that must eventually make every living being joyfully complete within himself, and therefore, at peace with himself and his neighbors.
See more »

Frequently Asked Questions

This FAQ is empty. Add the first question.

User Reviews

Move Over Mr Spock...2nd Best Limits Show
4 May 2006 | by See all my reviews

An alien gets human emotions and struggles to understand the human emotion known as love. Warren Stevens must deal with the confusing alien...not to mention his confused wife!

My IMDb reviews of classic Star Trek and classic Outer Limits do get some not useful votes around here but this review will prove that I do think Limits is top stuff sometimes. Year two of Limits got going in an okay way but then went wonderfully wild with Eddie Albert (yes, that Eddie Albert) being attacked by killer weeds! Eddie Albert had done the Voyage to the Bottom of the Sea pilot just months before the weeds, I guess the two shows combined put Albert in the position of being outstanding at being realistic in non-realistic sci-fic dramas. But the weeds were just a year two warm up before The Purple Twilight...

A good show needs to be good from the start and Keeper Of The Purple Twilight (I love that title) is a knockout from the word go. That opening image of the tall alien standing near a gate, on what looks like an alien world, but is really desert on good old earth, is an image you will long remember. Freeze the DVD on that sight and take it in. Act one then begins with an even better moment. The alien then sits in the back seat of an all American car and warns Warren Stevens that "You gain nothing by suicide". Granted, I am not so big on the deep messages in The Outer Limits, but on a film-making direction level, this hour is close to perfect.

This is my 2nd favourite episode of The Outer Limits due to the story, the guest stars (mainly Warren Stevens), the location filming, the score, and the three eight foot aliens that still look cool in this century! I have just read a negative review on this episode, mainly about the "confusing story", and am rather surprised that some disliked this episode. Then again, I am always won over by quality guests stars and great monsters...but the script is good, I was hanging on every word, mainly that bit where the wife finds the alien in her house with Stevens. Thankfully, this hour is free of the too corny and too theatrical talk heard in many Limits shows, but we do get a tiny taste of it - "Now, all good people are asleep and dreaming" - Oh well.

Some women of this century will find the hour sexist, some Get Smart (1965-70) fans will struggle with seeing "The Chief" acting straight, but to me, this is an almost perfect hour that defines The Outer Limits.

19 of 29 people found this review helpful.  Was this review helpful to you?

Message Boards

Recent Posts
If i love twilight zone , will i enjoy this? firewalkwithme1992
'The Sixth Finger' question about the ending Mikel3
Is it good for TZ fans? weiss_cosa
Carroll O'Connor's accent jeangabin1
50th anniversary of debut episode 'The Galaxy Being' john1956pa
The Outer Limits + QM's The Invaders (1967) StuOz
Discuss Keeper of the Purple Twilight (1964) on the IMDb message boards »

Contribute to This Page

Create a character page for: