Star Trek: The Next Generation: Season 2, Episode 3

Elementary, Dear Data (3 Dec. 1988)

TV Episode  |   |  Action, Adventure, Mystery
Your rating:
    1 2 3 4 5 6 7 8 9 10 -/10 X  
Ratings: 8.2/10 from 1,079 users  
Reviews: 6 user | 6 critic

An attempt to provide Data with a challenging Sherlock Holmes holodeck RPG scenario backfires when its Prof. Moriarty character accidentally becomes self-aware.



(created by), , 1 more credit »
0Check in

Watch Now

$0.00 with Prime Instant Video


IMDb Picks: April

Visit our IMDb Picks section to see our recommendations of movies and TV shows coming out in April.

User Lists

Related lists from IMDb users

a list of 27 titles
created 05 Jul 2011
a list of 24 titles
created 20 Aug 2011
a list of 164 titles
created 30 Nov 2012
a list of 22 titles
created 22 Mar 2013
a list of 38 titles
created 03 Jun 2013

Related Items

Connect with IMDb

Share this Rating

Title: Elementary, Dear Data (03 Dec 1988)

Elementary, Dear Data (03 Dec 1988) on IMDb 8.2/10

Want to share IMDb's rating on your own site? Use the HTML below.

Take The Quiz!

Test your knowledge of Star Trek: The Next Generation.
« Previous Episode | 28 of 176 Episodes | Next Episode »


1 video »


Episode cast overview:
Wesley Crusher (credit only)
Biff Manard ...
Diz White ...
Ensign Clancy (as Anne Elizabeth Ramsay)
Richard Merson ...
Pie Man


When the Enterprise arrives a few days early at its rendezvous point to meet the USS Victory, the crew have a bit of leisure time on their hands. For Data and Geordi Laforge, it means a trip to the holodeck and 221B Baker St. With Data in the role of Holmes and Laforge as Dr. Watson, they take on a challenge from Dr. Pulaski that Data couldn't solve a genuine mystery. Data has a bit of time adjusting to a real mystery - as opposed to one for which he knows the outcome. In giving the holodeck computer its instructions however, Geordi's specifications for an opponent results in a far superior creation than expected putting them and the entire ship in danger. Written by garykmcd

Plot Summary | Add Synopsis




Release Date:

3 December 1988 (USA)  »

Company Credits

Production Co:

Show detailed on  »

Technical Specs

Sound Mix:


Aspect Ratio:

1.33 : 1
See  »

Did You Know?


Picard utters the word "merde", the French for "shit". As it was said in a foreign language, it passed the TV censors. Merde is sometimes euphemistically translated as "damn" in subtitles. See more »


When La Forge is theorizing on the murder victim's demise, the police inspector squats down, resting his right hand on his right knee. But in the next shot, his right arm is on his right knee. See more »


Moriarty: [describing the Enterprise] A great monstrous shape, on which I am like a fly stuck on a turtle's back, adrift in a great emptiness.
See more »


Referenced in Trekkies 2 (2004) See more »


Star Trek: The Next Generation End Credits
Composed by Jerry Goldsmith and Alexander Courage
See more »

Frequently Asked Questions

This FAQ is empty. Add the first question.

User Reviews

Sometimes the Holodeck Is a Loose Cannon!
4 August 2014 | by (United States) – See all my reviews

On board the Enterprise, the Holodeck provides a recreational distraction for the crew. It is, without a doubt, the most complex of entities, going beyond the realm of current possibilities. For one thing, it is more than holographic. The people can be touched, the chairs sat in, the fog felt, and so on. Also, there are some possibilities that only the mind can envision. With the huge crew, there never seems to be a problem with crew members signing up for this thing. I believe there are two on the ship. Do only ranking officers get to use it? I know that in the future, little children are allowed in there. Anyway, it is fact, but there is little information about how it came to be (at least I haven't seen it yet). Back to the episode. Data has a thing for Sherlock Holmes and has created a program where he and Geordi (his Watson) encounter the villains from the Holmes canon. To Geordi's dismay, Data solves the crimes immediately, since he already knows the plot of the story. Geordi and Polaski talk him into allowing them to create a program where he has no idea what is going to happen. Geordi makes a terrible mistake when he asks that a character be created that could defeat "Data" rather than that could defeat "Holmes." This brings the great Moriarity to life and puts the ship and its crew in danger. The Holodeck seems to be able to create such an entity which would make it rather a dangerous thing, out of the hands of the crew. There are two issues at stake. The very life of the ship and Moriarity's mortality which comes into play. The final scene is a little too easy, but it gives us a thoughtful look at what constitutes a life form, which brings the prime directive into play. Picard goes about his business on a day to day basis, as crew members come and go in the Holodeck. It makes one wonder if some safeguards might be put in place after this episode.

1 of 1 people found this review helpful.  Was this review helpful to you?

Message Boards

Recent Posts
Why didnt Alexander join The Federation? Matthew7819
traveling within holodeck brucedgo
Why wouldnt Q have The Borg meet The Dominion in a first contact? Matthew7819
the music.. burnsmatthew2012
Ship in a Bottle continuity dhobday
after Parallels episode, could get creative with reality brucedgo
Discuss Elementary, Dear Data (1988) on the IMDb message boards »

Contribute to This Page

Create a character page for: