Although it was not a regular sound-effect on this series, the TOS-style comm system "whistle" was used twice in this episode.
For the entire episode, Kosinski appears without a comm badge.
Wesley Crusher is given a field promotion to Acting Ensign in this episode.
They're worried about The Traveler having enough energy to help them get back home, but they make him walk to engineering? Couldn't they carry him there to make sure he was at his best?
Picard refers to the ballerina as "ensign" but she has no pips - indicating she is crewman-rank.
Data sends a transmission back to the Federation while they are in the distant galaxy and quotes a ridiculous amount of time before it gets there. This is wrong. Many canon publications state that sub-space radio transmissions "decay" after so long, hence the need for sub-space relay stations. Data's transmission would never have arrived at all (well, maybe after hundreds of millions of years in a decayed RF state that would be unintelligible and useless).
When the Enterprise is flung into Warp 10+, Captain Picard asks Data at what speed they are travelling. Data replies using a contraction: "It's off the scale." It is mentioned a number of times throughout the series that Data is unable to use contractions.
When the Enterprise first accelerates to warp speed, the customary "flash" is missing, although it is seen otherwise throughout this episode and many others.
While the starship Enterprise is (at first) flung only two million light years away, it is stated that it would take over three hundred years to return to the Federation. This is, of course, ridiculous, when compared with the time scale associated with the 70,000 light year jump in Voyager.
Picard: Where is this place?
Data: Where none have gone before, sir.
Riker: Can anything he's proposing damage our systems?
Argyle: How could it? It's meaningless.
Riker: Then we should let him try it?
Kosinski: What do you mean "let him try it"? Don't talk about me in the third person as if I'm not standing right here!
Argyle: Yes, we might as well let him try it.
Kosinski: Oh, "yes, we might as well let him try it." You are too generous.
This episode was nominated for an Emmy award for Outstanding Sound Mixing in a Drama Series.
Eric Menyuk originally tried out for the role of Data.
While Duane and Reaves are credited for this episode, the shooting script was completly rewritten by producer Maurice Hurley. The original script can be found in various stages of completeness on Reaves' and Duane's web pages.
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