The computer of the Enterprise gains partial sentience and starts playing practical jokes on the crew.


(created by),


Add Image Add an image

Do you have any images for this title?



Episode cast overview:
Capt. Kirk (voice)
Mr. Spock (voice)
Dr. McCoy (voice)
Sulu (voice)
Uhura (voice)
M'Ress / Computer voice (voice)
Scott / Arex / Search party 7 Crewman (voice)


In the midst of a stand-off with the Rimulans, The Enterprise's computer systems, gain partial sentience, and with it, starts playing practical jokes upon the crew, which leads to a dangerous life-and-death battle with Romulans. Written by Tony-B4

Plot Summary | Add Synopsis



Official Sites:


Release Date:

21 September 1974 (USA)  »

Company Credits

Show detailed on  »

Technical Specs

Sound Mix:



Aspect Ratio:

1.33 : 1
See  »

Did You Know?


This takes place in 2270. See more »


Kirk orders a heading of 902 Mark 6. All headings must be between 1 and 360/000. They mark the points of the compass which has 360 degrees with 360 headed to the galactic center. The "mark" covers the "vertical" plane of the galaxy. See more »


Scott: Somebody turn of this infernal food factory!
See more »


Featured in Drawn to the Final Frontier (2006) See more »

Frequently Asked Questions

This FAQ is empty. Add the first question.

User Reviews

kid's stuff.
12 April 2015 | by (Bradenton, Florida) – See all my reviews

As I always point out, the animation for this show is pure crap. Low cell counts (with jerky, robotic movements) and ugly drawings are the norm for this series--and this one is unfortunately no exception. Even by 70s TV cartoons, this one is butt ugly.

The show begins with Romulans attacking Enterprise. The Captain takes the ship through an energy field to avoid them and in the process the computer aboard the ship is affected--becoming goofy and with a bad sense of humor. Dribble glasses, pies in the face graffiti on the Captain's uniform and other simple-minded pranks start occurring and everyone aboard laughs like crazy. Mostly, however, it looks like stuff most children watching the show would have laughed at instead of adults. Well, they eventually discover that the computer is behind all this.

This episode is clearly one that kids would love--because they would have thought the computer's jokes were funny. As for older audiences (and it's amazing that adults really embraced this show), it's harder going due to its silliness--which grates on you after a while. My verdict is an 8 for kids and a 5 for adults.

By the way, it is interesting that this show debuts the holodeck-- something I incorrectly assumed was created on "Star Trek: The Next Generation".

0 of 2 people found this review helpful.  Was this review helpful to you?

Message Boards

Recent Posts
In the long run, is this series worth it? gollumsmeagolrocks
Yesteryear - Timetravel huh? Ezel
First Saucer Sever...? clay56
Is there any place i can watch these on the internet? billyshears-2
sympathy for the devil episode... horrendous mothfodder
Animated Series Star Trek comic books kailer35
Discuss The Practical Joker (1974) on the IMDb message boards »

Contribute to This Page

Create a character page for: