It is stated that the Traveler is from Tau Ceti, but in his previous two appearances he was from Tau Alpha C.
During his meeting with the locals, no one on the Enterprise bothers to call Picard and tell him that not only have the Cardassians arrived, but they've beamed down to the village and are roaming around the place.
Picard: Inexcusable! You defied the orders of the ranking officer on the scene! You put the lives of the entire away team in jeopardy, and you've made an already tense situation worse!! Your actions reflect very badly on this ship and on that uniform. Now I want an explanation, Mr. Crusher, and I want it now!
Wesley: What you are doing down there is wrong. These people are not some random group of colonists. They are a unique culture with a history that predates the Federation and Starfleet.
Picard: That does not alter the fact that my orders are...
Wesley: I know Admiral Nechayev gave you an order, and she was given an order from the Federation council, but it's still wrong.
Picard: That decision is not yours to make, Cadet! I don't know what has gotten into you lately and frankly, right now, I don't care. But I will tell you this: while you wear that uniform, you will obey every order you are given and you will conform to Starfleet regulations and rules of conduct. Is that clear?
Wesley: Yes, sir, it is. But I won't be wearing this uniform any longer. I'm resigning from the Academy.
This is Wil Wheaton's last performance as Wesley Crusher in the series. He will go on to make a brief cameo in the film Star Trek: Nemesis.
This episode is the genesis of Commander Chakotay on Star Trek: Voyager. It shows Native Americans survived into future generations and considering they have to evacuate a planet for the Cardassians, it would also explain Chakotay's role in the Maquis.
Gul Evek (Richard Poe) is one of only four characters to appear on Star Trek: Deep Space Nine before appearing on this series. The other three are Dr. Julian Bashir (Siddig El Fadil), Quark (Armin Shimerman) and Admiral Chekote (Bruce Gray).
This was the writers' (Moore's in particular) attempt to make peace with the Wesley character. After the "Wesley saves the ship" syndrome of the first season many had struggled with how to present the character. This episode both shows Wesley as having a deeper dimension and sets him on his own distinct path.