The Invaders: Season 1, Episode 8

Quantity: Unknown (7 Mar. 1967)

TV Episode  |   |  Drama, Sci-Fi, Thriller
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A strange, metallic cylinder is stored at a laboratory, waiting to be tested. It belongs to the aliens, and they are willing to kill in order to get it back.



(teleplay), (story), 1 more credit »
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Title: Quantity: Unknown (07 Mar 1967)

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Episode cast overview:
Harry Swain
Colonel Frank Griffith
Milton Selzer ...
A.J. Richards
Diane Oberly
Barney Phillips ...
Walt Anson
Douglas Henderson ...
Lieutenant Farley
Ernest Sarracino ...
Leo Rinaldi
Byron Keith ...
Air Crash Investigator
Michael Harris ...
Mail Truck Driver
Raymond Guth ...
Guard #2
Mel Ruick ...
Minister (as Melville Ruick)
Ron Doyle ...


A private plane crashes, but the investigators can't find a record of the flight, nor can they find a body - even though it was a crash no one could have walked away from. What they do find is a cylinder made of some strange metal they can't identify. They have it sent to Sperrick Laboratories. It arrives, but not without incident. Someone tried to hijack the mail truck, and two security guards were killed. David Vincent arrives at Sperrick to investigate. He is certain that the aliens were behind the attempted hijacking and that what they wanted was that strange cylinder. He is also certain that they will try again. Vincent finds allies in a security guard and a woman scientist. But as always, he never knows which of his friends are real and which are enemies in disguise. Written by J. Spurlin

Plot Summary | Add Synopsis


Drama | Sci-Fi | Thriller




Release Date:

7 March 1967 (USA)  »

Company Credits

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Technical Specs


Sound Mix:


Aspect Ratio:

1.33 : 1
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Did You Know?


William Talman's final TV role. See more »


The strange metallic cylinder floats in water thanks to a pair of visible wires. See more »


Narrator: [Epilog Narration] For David Vincent, every friend is a potential enemy. His enemies understand this. Someday, perhaps, his friends will, too.
See more »

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