What episodes of Star Trek TOS were Dilithium Crystals shown on screen. (Not just mentioned.) Thanks, Stan

  • This is a "question calling for a list of works" and therefore off-topic. – Peregrine Rook Feb 4 '16 at 1:44
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    Finite, concrete lists are allowed and on-topic. – user31178 Feb 4 '16 at 1:53
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    its also not a list of works, its looking for episodes within 1 work. – Himarm Feb 4 '16 at 1:55
  • Thank you to N_Soong for correcting my misspelling. From this day forward I will always remember it as Dilithium. I take these opportunities to learn, and not (as some people do) to get mad. I truly appreciate the help. Stan – Stan Feb 4 '16 at 8:23
  • I agree with CreationEdge, the (accepted) answer linked in CreationEdge's comment pretty clearly indicates this question does not fall into the "question calling for a list of works" category. Voting to re-open. – Hypnosifl Feb 5 '16 at 18:29

I thought about it some more, and there were three episodes. I checked my DVDs, and hunted up all the scenes I could find.

  1. Mudd's Women Season 1

Spock shows one of the crystals that was damaged in rescuing Mudd.

enter image description here

  1. The Alternative Factor Season1

Lazarus and crazy Lazarus both steal crystals from the Enterprise. You see the crystals several times, and also the dilithium chamber.

Here's the dilithium chamber: Dilithium chamber

Crazy Lazarus with two crystals in a bag. Lazarus with two crystals in a bag.

Crazy Lazarus with the crystals in his UFO: enter image description here

Kirk throwing crazy Lazarus through his UFO into the corridor between the universes (crystals visible.) enter image description here

Lazarus (not the crazy one) with the crystals in the alternate universe : enter image description here

  1. Elaan of Troyius Season 3

    This is the one everybody remembers, probably because Elaan was wearing them as a necklace - and she spent most of the episode wearing costumes that would make a stripper blush. I can't believe it took me nearly 40 years to recognize the ham fisted play on words "Helen of Troy" and "Elaan of Troyius"

Burned out crystal in the dilithium chamber - note that it is now in a the engine room proper - and that the crystal looks like the ones in "The Alternative Factor." enter image description here

Elaan with the necklace (no one knows that it is of dilithium yet.) enter image description here

Elaan has left the bridge and come back. Spock discovers her necklace is made of dilithium. enter image description here

Spock and Scotty installing the "crude crystals" in the dilithium chamber. If you look, you'll see the burned out one lying there. It looks like the ones from "The Alternative Factor" but it is burned looking. enter image description here

Elaan leaving the Enterprise. Notice she's wearing her necklace again. Kirk must have given it back. enter image description here

It seems the props folks didn't have a real clear idea of what the dilithium crystals should be and what they should look like.

  • After seeing all three, I suspect that the Dilithum Crystals in the necklace from "Elaan of Troyius" are the ones I bought fragments of from Chris Doohan. It's been a long day, but I will post photos tomorrow. Thanks to all, for your expertise in Star Trek TOS. (Funny I was never a big fan of TOS, but Love "ST Enterprise" and "ST Voyager". Stan – Stan Feb 5 '16 at 8:48
  • Maybe I'm not remembering correctly, but in Mudd's Women weren't they referred to as "Lithium" crystals? – Xantec Feb 5 '16 at 21:10
  • #1. that Spock is holding, appears to be a healthy Quartz Crystal with some Iridescent Hematite on it's base and part of one facet. – Stan Feb 5 '16 at 22:30

In TOS 'Elaan of Troyius', we see Dilithium Crystals twice. We see some in a necklace:

enter image description here

and also see some burnt out in the assembly itself:

enter image description here


Besides the three episodes that were previously mentioned, I believe there is a brief scene in The Paradise Syndrome. I've only seen it once, as it seems to have been deleted from most syndication packages, but it's when Enterprise is closing in on the asteroid. Scotty does a quick visual inspection of the crystals where he reports to Spock, "Dilithium crystal circuit's failing, sir."

Found a still:

enter image description here


Elaan of Troyus is the only one I know.

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